Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsIf what you love about the Speedmaster Moonwatch is its historically styled presentation, the Hesalite version is the one to consider. It is not a requirement for every fan: OMEGA sells the current Moonwatch Professional in both Hesalite and sapphire. The Hesalite steel-bracelet model is reference 310.30.42.50.01.001.
Which current Speedmaster has Hesalite?
OMEGA’s current collection is called the Speedmaster Moonwatch Professional. Its black-dial, stainless-steel Hesalite model with a steel bracelet is reference 310.30.42.50.01.001. It has a 42 mm case and a manual-winding calibre 3861. OMEGA also lists a Hesalite version on a nylon strap, reference 310.32.42.50.01.001.
For the steel-bracelet model, OMEGA’s product sheet specifies a 20 mm lug width, 47.50 mm lug-to-lug measurement, 13.54 mm thickness and approximate weight of 134 g. It lists 50 m water resistance, a 50-hour power reserve, METAS Master Chronometer approval and resistance to magnetic fields up to 15,000 gauss. These specifications are for reference 310.30.42.50.01.001; check the specification sheet for another reference before assuming every detail is identical. OMEGA’s product sheet
What Hesalite adds to the Moonwatch’s appeal
The case for Hesalite is chiefly about design and historical presentation. OMEGA describes the Moonwatch’s spaceflight heritage and says the collection received NASA flight qualification in 1965. That history helps explain why a fan might prefer the Hesalite configuration, but it does not show that the crystal on today’s watch is necessary for spaceflight, or that it caused the original qualification. OMEGA’s Moonwatch collection page
#1 Best Overall
In its 2021 Moonwatch guide, Hodinkee describes the Hesalite model as having a painted dial logo and a solid caseback. Those details distinguish its presentation from the sapphire configuration and may matter to someone choosing between the two. They are design differences, not proof that one version is objectively better. Hodinkee’s model guide
Hesalite vs. sapphire: what changes?
OMEGA offers the Moonwatch Professional with either crystal. The following comparison focuses on the current steel-bracelet versions; the Japanese collection listing also shows strap configurations, and options can differ by region.
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- Black Dial, 42mm Stainless Steel Case and Stainless Steel Bracelet
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| Decision point | Hesalite | Sapphire |
|---|---|---|
| Steel-bracelet reference | 310.30.42.50.01.001 | 310.30.42.50.01.002 |
| Crystal | Hesalite | Sapphire |
| Dial and caseback treatment | Hodinkee’s 2021 guide describes a painted dial logo and solid caseback. | Hodinkee’s 2021 guide discusses differences from the Hesalite version; consult the reference-specific product information for exact details. |
| Bracelet appearance | OMEGA lists a brushed steel bracelet. | OMEGA lists polished and satin-finished links. |
| Japanese listing price | ¥1,111,000 | ¥1,276,000 |
The prices are listed on OMEGA Japan’s page as accessed October 4, 2026. They are regional, time-sensitive figures—not US prices or a guarantee of what either watch costs elsewhere. Check OMEGA’s listing for your market for current price and availability. OMEGA Japan’s collection listing
The finish difference is a matter of appearance and preference. This comparison does not establish measured scratch or shatter performance, so it should not be read as a durability test or verdict.
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- Model 310.32.42.50.01.001
Who should choose the Hesalite model?
Choose the Hesalite reference if the traditional-looking presentation, painted dial logo, solid caseback and brushed bracelet are the combination you want. Choose between it and the sapphire version by considering the crystal and the overall design details, then confirm the price and specifications for the exact reference in your region.
Quick Recap
Best Value
Rank #4
- Model 310.30.42.50.01.002
- Consider Hesalite if historical styling is central to what you enjoy about the Moonwatch.
- Compare sapphire if you prefer that crystal option or the listed bracelet finish of the sapphire reference.
- Check the reference before buying: the steel-bracelet Hesalite model is 310.30.42.50.01.001; the listed sapphire steel-bracelet model is 310.30.42.50.01.002.
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.
