How to Identify Your Apple Watch Model | Simple Guide

How to Identify Your Apple Watch Model: A Simple Guide for Every User

Last Updated: 27 Jul 2026


If you've ever wondered, “Which Apple Watch do I have?”, you're not alone. With numerous models and generations, it can be challenging to determine which Apple Watch you own. Knowing your Apple Watch model is important for compatibility with bands, software updates, and troubleshooting.

In this guide, we'll walk you through the steps to identify your Apple Watch model using model numbers, settings, and physical features.

Step 1: Check Your Apple Watch Model Number

The simplest way to identify your Apple Watch is by locating its model number. Here's how:

Using Your Apple Watch:

  1. Open the Settings app on your Apple Watch.
  2. Navigate to General > About.
  3. Look for the Model Name and Model Number.

Using an iPhone:

  1. Open the Watch app on the paired iPhone.
  2. Go to General > About.
  3. Find the Model Number field. You should see the Part Number that begins with "M."
  4. Tap it to reveal more details. You should see the field update to show a five-digit number that begins with "A." This is your Model Number.
  5. You may also see the Case Size and materials listed under Model Detail.

Models by Apple Watch Case Size:

  • 49mm: Ultra (Gen 3), Ultra (Gen 2), Ultra (Gen 1)
  • 46mm: Series 11, Series 10
  • 45mm: Series 9, Series 8, Series 7
  • 44mm: Series 6, Series 5, Series 4, SE (Gen 3), SE (Gen 2), SE (Gen 1)
  • 42mm: Series 11, Series 10, Series 3, Series 2, Series 1, Apple Watch (1st Gen)
  • 41mm: Series 9, Series 8, Series 7
  • 40mm: Series 6, Series 5, Series 4, SE (Gen 3), SE (Gen 2), SE (Gen 1)
  • 38mm: Series 3, Series 2, Series 1, Apple Watch (1st Gen)

Decode the Model Number:

  • Apple Watch model numbers typically start with "A" (e.g., A2476, A2354). These numbers can be cross-referenced using Apple's official list in Step 5 to identify the specific model.

Decode Part Numbers:

  • Each part number (e.g., MNP13ZP/A) has a systematic meaning:

    The first 5 numbers can be cross-referenced using the list in Step 5 to identify the specific model.
  1. First 3 Letters: Product family (e.g., MNP = Apple Watch).
  2. Numbers: Configuration identifier (size, material, connectivity).
  3. Last Letters: (Region)
    • LL/A: U.S.
    • ZP/A: Asia-Pacific
    • B/A: UK/Europe
    • CH/A: (China)
    • X/A: (Australia/New Zealand)

Step 2: Check the Back of the Apple Watch

On the back of the Apple Watch, near the sensor housing, you'll find engraved details. This includes the model name, case size, and additional features (e.g., GPS + Cellular). Use these details to identify your model.

Step 3: Compare Physical Features

Each Apple Watch model comes with unique features that can help you identify it:

Case Size and Shape:

  • Case sizes vary by generation (e.g., 38mm, 40mm, 41mm, 44mm, 45mm, 42mm, 46mm or 49mm).
  • The design and bezel shape will also differ between models (e.g., rounded edges in earlier models versus flat sides for newer models).

Digital Crown:

  • The Digital Crown varies in appearance. For instance, some models have a red circle on the crown, indicating LTE/Cellular compatibility.

Display Type:

  • Older models (like Series 3 and earlier) have thicker bezels, while newer models feature more edge-to-edge displays.

Special Features:

  • Identify unique model features like the Action Button (in Apple Watch Ultra) or health features (e.g., ECG, SpO2 tracking).

Step 4: Use Serial or Model Numbers for Detailed Information

You can use your Apple Watch's serial number for more detailed information:

Where to Find the Serial Number:

  • On the Apple Watch: Go to Settings > General > About.
  • On the iPhone: In the Watch app under General > About.

Once you have the serial number, input it into Apple's Check Coverage website for detailed model and warranty information.

Step 5: Understanding the Difference between Models

  1. Model Numbers:
    • Each hardware model number (e.g., A2978 for Series 9) indicates the generation, case size, connectivity, and sales region — note that some finishes share a model number (e.g., aluminum and titanium cellular models of the same size), so check the case-back engraving for the material.
  2. Materials:
    • Aluminum: Standard models for most generations.
    • Stainless Steel: Premium models with added durability offered in Series 2, Series 3, Series 4, Series 5, Series 6, Series 7, Series 8 & Series 9.
    • Titanium: Offered in Series 5, Series 6, Series 7, Series 10, Series 11 & Ultra models.
    • Ceramic: Available in Series 2, Series 3 & Series 5.
  3. Sizes:
    • Earlier models were limited to 38mm and 42mm.
    • Series 4 introduced larger sizes of 40mm and 44mm, and Series 7 brought 41mm and 45mm.
    • Series 10 and Series 11 have 42mm and 46mm sizes.
    • Ultra models have a unique 49mm size.
  4. Connectivity:
    • GPS-only models: Limited to Aluminum and available in budget-friendly versions like SE.
    • GPS + Cellular: Premium models in Aluminum, Stainless Steel, Titanium, or Ceramic.

Step 6: Reference Apple's Model Number List

Here's an overview of Apple Watch models listed by Generation and Case Size with their corresponding Model Numbers (A####) and Part Numbers.

Each Part Number (M####) represents configurations for band, material, size, region, and connectivity. Space limitations prevent listing all regional suffixes (e.g., LL/A, ZP/A, CH/A) for every part number. To simplify the table further, we list only the first 5 digits of the Part Numbers (ignoring the regional suffix, e.g., LL/A, ZP/A) since the first 5 digits uniquely identify the configuration (case size, material, band type).

Apple Watch Series 11

46mm:

  • Model A3333, A3451, A3337, A3453
  • Part Number 1st 5 digits: varies by finish and band — use the Settings method above to confirm your exact configuration

42mm:

  • Model A3331, A3450, A3335, A3452
  • Part Number 1st 5 digits: varies by finish and band — use the Settings method above to confirm your exact configuration

Apple Watch Series 10

46mm:

  • Model A2999, A3000, A3003, A3206
  • Part Number 1st 5 digits: MWWW3, MX1U3, MWWY3, MX1Y3, MWWX3, MX1W3, MX0F3, MX0T3, MX0H3, MX0V3, MX0G3, MX0U3, MX0J3, MX0W3, MX0N3, MX0Y3, MX0M3, MX0X3

42mm:

  • Model A2997, A2998, A3001, A3002
  • Part Number 1st 5 digits: MWWW3, MX1U3, MWWY3, MX1Y3, MWWX3, MX1W3, MX0F3, MX0T3, MX0H3, MX0V3, MX0G3, MX0U3, MX0J3, MX0W3, MX0N3, MX0Y3, MX0M3, MX0X3

Apple Watch Ultra

Ultra 3:

  • Model A3281, A3282
  • Part Number 1st 5 digits: varies by finish and band — use the Settings method above to confirm your exact configuration

Ultra 2:

  • Model A2986, A2987
  • Part Number 1st 5 digits: MRFU3, MRFV3, MYT73, MYT93, MYT33, MYTJ3, MYTC3, MYTH3, MYTF3

Ultra 1:

  • Model A2622, A2684, A2859
  • Part Number 1st 5 digits: MQFY3, MQG03, MQG13

Apple Watch Series 9

Shop 45mm:

  • Model A2980, A2984, A2985
  • Part Number 1st 5 digits: MR9Q3, MR973, MR9P3, MR9R3, MRXM3, MR9T3, MRQH3, MRQT3, MRQG3, MRQR3, MRQJ3, MRQU3, MRYJ3, MRYL3, MRQK3, MRQV3, MRQL3, MRQW3, MRQM3, MRQX3, MRQN3, MRQY3.

Shop 41mm:

  • Model A2978, A2982, A2983
  • Part Number 1st 5 digits: MR9L3, MR9K3, MR9M3, MRXL3, MR9N3, MRPX3, MRQ73, MRPW3, MRQ63, MRPY3, MRQ83, MRYA3, MRYD3, MRQ03, MRQ93, MRQ23, MRQC3, MRQ13, MRQA3, MRQ33, MRQD3

Apple Watch Series 8

Shop 45mm:

  • Model A2771, A2774, A2775, A2858
  • Part Number 1st 5 digits: MNP83, MNP93, MP6T3, MNPA3, MNN73, MNN63, MNN83, MNNA3, MNN93, MNNC3, MP523, MP513, MP533, MNNE3, MNND3, MNNF3, MNNH3, MNNG3, MNNJ3, MNNL3, MNNT3, MNNK3, MNNR3, MNNM3, MNNW3, MNNP3, MNNN3, MNNQ3, MNNY3, MNNX3, MNP03

Shop 41mm:

  • Model A2770, A2772, A2773, A2857
  • Part Number 1st 5 digits: MNPC3, MNPD3, MP6R3, MNPF3, MNLF3, MNLE3, MNLG3, MNLJ3, MNLH3, MNLK3, MP4Y3, MP4X3, MP503, MNLM3, MNLL3, MNLN3, MNLQ3, MNLP3, MNLR3, MNLU3, MNN13, MNLT3, MNN03, MNLV3, MNN23, MNLX3, MNLW3, MNLY3

Apple Watch SE (3rd Generation)

Shop 44mm:

  • Model A3325, A3392, A3328, A3329
  • Part Number 1st 5 digits: varies by finish and band — use the Settings method above to confirm your exact configuration

Shop 40mm:

  • Model A3324, A3391, A3326, A3327
  • Part Number 1st 5 digits: varies by finish and band — use the Settings method above to confirm your exact configuration

Apple Watch SE (2nd Generation)

Shop 44mm:

  • Model A2723, A2724, A2727, A2856

Shop 40mm:

  • Model A2722, A2725, A2726, A2855

Apple Watch Series 7

Shop 45mm:

  • Model A2474, A2477, A2478

Shop 41mm:

  • Model A2473, A2475, A2476

Apple Watch Series 6

Shop 44mm:

  • Model A2292, A2294, A2376

Shop 40mm:

  • Model A2291, A2293, A2375

Apple Watch SE (1st Generation)

Shop 44mm:

  • Model A2352, A2354, A2356

Shop 40mm:

  • Model A2351, A2353, A2355

Apple Watch Series 5

Shop 44mm:

  • Model A2093, A2095, A2157
  • Note: Catalyst cases are not compatible with Ceramic versions MWQU2 & MWR72 as they are slightly larger

Shop 40mm:

  • Model A2092, A2094, A2156
  • Note: Catalyst cases are not compatible with Ceramic versions MWQ22 & MWQF2 as they are slightly larger

Apple Watch Series 4

Shop 44mm:

  • Model A1978, A1976, A2008

Shop 40mm:

  • Model A1977, A1975, A2007

Apple Watch Series 3

Shop 42mm:

  • Model A1859, A1861, A1891, A1892
  • Note Catalyst Cases are not compatible with Ceramic versions MQKD2, MQM52, MQR22, MQKE2, MQM62 & MQR32 which are slightly larger

Shop 38mm:

  • Model A1858, A1860, A1889, A1890
  • Note: Catalyst Cases are not compatible with Ceramic versions MQJY2, MQM32, MQQP2, MQK02, MQM42 & MQQQ2 which are slightly larger

Apple Watch Series 2

Shop 42mm:

  • Model A1758, A1817
  • Note: Catalyst Cases are not compatible with Ceramic version MNPQ2 which is slightly larger

Shop 38mm:

  • Model A1757, A1816

Shop Compatible Apple Watch Cases

Now that you've identified your Apple Watch model, protect it with a waterproof case built for your exact size. Our 100M waterproof cases include a sport band and are designed for active lifestyles:

45mm – 100M Waterproof Case + Band
Apple Watch Series 9 / 8 / 7

Full 100M waterproof protection with an integrated sport band. Perfect for swimming, surfing, and outdoor adventures.

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42mm – 100M Waterproof Case + Band
Apple Watch Series 3 / 2

Rugged waterproof protection for older Apple Watch models, with a durable sport band included.

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Browse all Apple Watch cases →

Conclusion

Identifying your Apple Watch model is straightforward once you know where to look. Use the Settings app, the case back engraving, or the model number list above to pinpoint your exact model. Once you know your model, you can shop with confidence for the right accessories, bands, and protective cases.

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