We've had some discussion before about the type of face used on UG moonface moonphase discs. You mostly see one type, but there's some variation. This is the most common type (connected eyebrow and nose): But there's another variation you see sometimes (disconnected eyebrow and nose) which looks like this: That second one belongs to @rolokr Anyhow I recently found a similar example in a box of UG parts. Aside from the different face, it's also thinner, and I think a touch larger (need to check with calipers). These pics show the thin one next to two "standard" examples from a cal 287. So two questions..... 1) is this just an acceptable variation on UG moonface (I lean towards yes) 2) what does the thinner version belong to, is that for a triple date moonphase instead of a chrono? I've never compared the discs side by side before, but I have been told by my watchmaker they are not interchangeable.