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Ochs und Junior Moon Phase / Selene (OJ Blue)

The Ochs und Junior Moon Phase / Selene (OJ Blue) is a 42 mm Grade 5 titanium watch with an ETA 2824-2 automatic movement.

All Ochs und Junior watchesOther watchesUnder 11 mm thickLightweightLightest, rankedGrade 5 titanium
Material
Titanium
Grade / type
Grade 5
Weight
70 g (with strap)
Water resistance
100 m
Type
Other
Case diameter
42.0 mm
Thickness
11 mm
Origin
Switzerland
Movement
Automatic (epicyclic moon-phase module)
Caliber
ETA 2824-2
Power reserve
38 h
Complications
Date
Colour
Grey
Surface treatment
Machined (visible machining marks)
Finish technology
Natural finish
Nickel-free
Unconfirmed (contact-point materials not all confirmed)
Bracelet / strap
Ecopell Enzian leather strap
Crystal
Sapphire
Display back
No
Dial
OJ blue, with a 30+1 hole analogue date spiral and 5-minute reference markers
Dial colours
Blue
Lume
Swiss Super-LumiNova (blue)
Availability
Offered
Status
Current; the maker states it produces about 50 moon phase watches per year, sold personally from its La Chaux-de-Fonds workrooms; also offered at 39mm (62g)
Not published
Reference, Price, Lug-to-lug, Hardness, Construction, Caseback, Matching bracelet
High confidence Verified Sep 2026 Source: Ochs und Junior (maker product page)
Facts are free to cite with a link.
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Frequently asked questions

What grade of titanium is the Ochs und Junior Moon Phase / Selene (OJ Blue)?

Grade 5, as stated by the maker.

What size is the Ochs und Junior Moon Phase / Selene (OJ Blue)?

The case is 42 mm across and 11 mm thick. It is water resistant to 100 m.

How much does the Ochs und Junior Moon Phase / Selene (OJ Blue) weigh?

About 70 g on its strap.

How much does the Ochs und Junior Moon Phase / Selene (OJ Blue) cost, and is it available?

It is in production, but the maker does not publish a price.

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