JLC cal 285 two-register vintage chronograph - kosher?

hey folks,

I came across @LouS very detailed posts about vintage JLC 2-register chronos that used UG movements, and started exploring a bit more (always a dangerous activity ... 😗)

So I came across this JLC 2-register chronograph that's for sale. It's in steel, and said to be 37mm without crown.



I consulted Zaf Basha's book (pages 74-77) and as far as I can tell about this watch for sale:
1. It has a UG calibre 285 , which is consistent as far as I know
2. The dial resembles the one in the book on p76 (see below)



It looks quite patina-ed and faded, so it's not a recent redial, and I think it's not refinished (but I could be wrong!)
3. The serial dates it to around 1957/1958?
4. Inscription says 6-11-90. Bit odd, 1990? Was it a gift of a vintage watch to someone in 1990?

Could I ask the experts (especially @LouS and @Noodia) :
1. Did these 2-register chronos ever come in SS in that 37mm size? Or is this chromed nickel? Or worse, is this a franken?
2. Does the movement look OK? (looks a bit mucky, probably needs a service)
3. Are there any other "red flags" or warning signs about the watch?

Thanks in advance for your help folks!

Heh heh thanks guys. And no I'm not Jewish though a childhood reading Asimov, Silverberg, Saul Bellow and Phillip Roth , plus the films of Woody Allen, taught me some Yiddish words (and a deep appreciation of pastrami).

So it seems to check out ok? The inscription is weird though - can't figure it out - '90'?

I believe the dial is fine. The inscription is a head-scratcher, and will likely remain so.

Always nice to find a "jumbo" from this era of smaller watches - it's from the 40's by the way, not the late 50s.