For a first or only Omega Speedmaster, the stainless-steel 2021 Moonwatch is the strongest all-round choice. Choose Hesalite reference 310.30.42.50.01.001 for the historically faithful crystal, solid caseback and lower launch price; choose sapphire reference 310.30.42.50.01.002 if scratch resistance and a view of the movement matter more.
Why the 2021 Moonwatch is the best first Speedmaster
The 2021 stainless-steel Moonwatch pairs the Professional’s familiar 42 mm case family with Omega’s Co-Axial Master Chronometer calibre 3861. It is the clearest starting point if you want the classic Speedmaster Professional rather than a different design, a vintage watch or a precious-metal edition. The two steel references share the movement and basic case design; the main decision is Hesalite versus sapphire.
![[Omega] OMEGA Watch [2021 Omega 310.30.42.50.01.002 Speedmaster Moon Watch Professional Hand Winding See Through Back Chronograph Black 5 ATM Waterproof [Parallel Import], Black, Bracelet Type](https://m.media-amazon.com/images/I/41w4a0vIS+S._SL160_.jpg)
What changed with the 2021 Moonwatch
Omega replaced calibre 1861 with calibre 3861 and revised the Professional’s design. The update brought a vintage-style step dial, a Dot-Over-Ninety bezel detail, a case inspired by the ST 105.012, a double-bevel caseback and a redesigned five-link bracelet. Fratello’s buyer guide describes the Master Chronometer specification as resistance to magnetic fields above 15,000 gauss and average accuracy of +5/0 seconds per day; those figures describe the certification as presented in that guide, not an independent test.
Hesalite or sapphire: which reference fits you?
| Feature | Hesalite — 310.30.42.50.01.001 | Sapphire — 310.30.42.50.01.002 |
|---|---|---|
| Crystal | Hesalite, the historically correct choice, with a low-reflection optical character; it scratches more easily than sapphire. | Sapphire with internal anti-reflective treatment; highly scratch resistant. |
| Caseback | Solid steel back; no view of the movement. | Transparent back showing calibre 3861. |
| Omega logo on crystal | Printed. | Applied. |
| Bracelet finish | Fully brushed stainless steel. | Brushed and polished links. |
| Thickness | Approximately 13.6 mm, according to Monochrome Watches. | Approximately 13.2 mm, according to Monochrome Watches. |
| Best suited to | Buyers who value historical fidelity, a solid back and the lower launch price. | Buyers who prioritise scratch resistance, movement visibility and the applied logo. |
Hesalite can pick up scratches, but light marks can be polished. Under a severe impact, it tends to crack rather than shatter. Omega also offered the Hesalite model on a nylon fabric strap or a fully brushed steel bracelet, according to its product copy.
#1 Best Overall
- First Man On The Moon Watch Model 31130423001005
- Famous Manual-winding Chronograph Movement that was Worn on the Moon
- Omega Mechanical Caliber 1861
- Black Dial, 42mm Stainless Steel Case and Stainless Steel Bracelet
- Presentation Box Includes NATO Strap, Velcro Strap and Strap Changing Tools
Size and water resistance
Both versions have a 42 mm diameter. The thickness figures above come from Monochrome Watches. The watches are rated to 5 bar, approximately 50 metres or 165 feet, according to Fratello Watches. Treat that rating as a specification, not a reason to assume every watch is suitable for every water activity.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the launch prices tell you
Published 2021 European launch prices differ between sources, so they should be read as historical market figures rather than current prices or a universal price list.
Rank #2
- Model 310.32.42.50.01.001
| Configuration | 2021 price reported | Source and qualification |
|---|---|---|
| Hesalite on steel bracelet | EUR 6,300 | Time and Watches, reporting the 2021 launch. |
| Hesalite on steel bracelet | EUR 6,200 | Fratello Watches, in its 2021 guide’s market context. |
| Sapphire on steel bracelet | EUR 7,200 | Time and Watches, reporting the 2021 launch. |
| Sapphire on steel bracelet | EUR 7,100 | Fratello Watches, in its 2021 guide’s market context. |
| Hesalite on fabric strap | EUR 5,900 starting price | Fratello Watches, in its 2021 guide’s market context. |
The difference between the two published bracelet prices is a reminder to check the region, configuration and date when comparing a listing; these figures do not establish what either reference costs now.
Quick Recap
Best Value
- Model 310.30.42.50.01.002
Rank #4
When another Speedmaster makes more sense
- Speedmaster ’57: Consider it if you want a different Speedmaster design rather than the familiar Professional format. The available information here does not establish a specific ’57 configuration or price to compare.
- Vintage Professional, such as reference 145.022: Consider vintage if an older reference is the point of the purchase and you are prepared to do authentication homework. Fratello says the market for very good vintage Speedmasters is getting thin, so condition and authenticity need careful attention.
- 39.7 mm Calibre 321 “Ed White”: Consider it if you specifically want the smaller 39.7 mm model and its Calibre 321 identity rather than the 42 mm 3861 Moonwatch.
- Gold or platinum Professional: These are alternatives if precious-metal construction is a priority; the available information does not establish comparable prices.
A practical decision
- Choose the Hesalite reference if you want the historically faithful crystal, accept more frequent scratch care and prefer the solid caseback.
- Choose the sapphire reference if scratch resistance and seeing calibre 3861 through the caseback outweigh the added cost reflected in the 2021 launch prices.
- Compare the exact reference, bracelet or strap configuration, seller and current regional price before buying; do not use a 2021 launch price as a current quote.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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