42.5mm "Speedmaster" Black Series Stainless Steel Upgrade
42.5mm "Speedmaster" Black Series Stainless Steel Upgrade
42.5mm "Speedmaster" Black Series Stainless Steel Upgrade
42.5mm "Speedmaster" Black Series Stainless Steel Upgrade
42.5mm "Speedmaster" Black Series Stainless Steel Upgrade
42.5mm "Speedmaster" Black Series Stainless Steel Upgrade
42.5mm "Speedmaster" Black Series Stainless Steel Upgrade
42.5mm "Speedmaster" Black Series Stainless Steel Upgrade
42.5mm "Speedmaster" Black Series Stainless Steel Upgrade
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42.5mm "Speedmaster" Black Series Stainless Steel Upgrade

Home/Store/Moon watch Upgrades/Upgrade Your Moon Watch
£175.00
Bezel Colour
Please choose
Flat Sapphire Glass 1.5 mm
Please choose
Engraved Back
Please choose
Strap Options
Please choose
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42.5mm "Speedmaster" Black Series Stainless Steel Upgrade

5.0
3 reviews
Reviews from verified customers who have purchased products at this store.
Home/Store/Moon watch Upgrades/Upgrade Your Moon Watch
Product Details

Encase your Moon watch in Black Stainless Steel and Sapphire Glass to make it truly stand out. This brings the Moon watch to the next level in terms of quality and design closer to its roots.


What am I buying?

You are purchasing a black steel case conversion for your Moon watch. You will need to send your watch** to us and we will do the rest. See details below or contact us for details.

This includes removing the watch movement from its original Bio-ceramic case*** (see note below we do not recommend you try this yourself). We will then clean, check and put in a new battery before installing it into an nice new stainless steel case. The strap is NOT included in this price

The black steel case is a must have upgrade.

Size Width 42.9mm (44.9mm with crown) x Depth 14mm

No more broken pushers.

Sapphire glass instead of plastic.

Black Speedmaster style steel case.

You will be asked to choose a bezel colour, at the moment we have 7 to choose from.

Black - White numbers

Black - Orange White numbers

Silver - Black numbers

Red - White numbers

Blue - White numbers

Blue - Orange White numbers

Green - White numbers

If you have any questions please contact us via email or Whatsapp.

**Please note this is only for customer who already have a Moon watch and want our stainless steel re-casing. If you do not have a watch for this please do not purchase this item. It does not include the cost of the Moon watch only the steel case conversion.

(Bracelet or wrist strap sold separately)

*** Please be aware that this process will render the original case un-useable.

Send your watch to the address below (please include you name and your order number).

IMPORTANT: Please email us before sending your watch

Perfectum Tempus Ltd

8 Coalville Road,

Southampton,

SO19 8GQ.


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Customer reviews
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Reviews are only accepted from verified customers who have signed in and purchased the products. This ensures that each review is based on genuine customer experiences. All reviews are checked before publication to prevent spam.
Johnny D.
Oakham,
United Kingdom
02 May 2026
Recently upgraded my MoonSwatch Mission to the Moon with a Black Series stainless steel case… and it’s completely transformed the watch. What was once a fun, lightweight piece now feels solid, premium, and genuinely closer to the Speedmaster DNA. The added weight and feel of the steel to give it real wrist presence, and the darker finish with the orange accents just works. It still keeps that playful MoonSwatch identity, but now with a much more serious edge. Feels less like a novelty and more like a watch you actually choose to wear
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