congratulations you have a super rare watch! and yes it is the rare 15630 silver dial - you can recognize on the orange framed markers. the earlier 1563 silver dial had white frame markers (pls see picts on otd).

i had the same model which unfortunately got stolen last year - i missed to to note the serial number but mine had a tiny damage so i doubt it's yours ;-).
your watch would be the second known silver dial 15630 next to mine - 2 known examples in the world.

your dial is 100% correct for a 15630 model - maybe it's in a wrong 15630 case?

however the 15630 model has a mineral glass and a matt dark grey inner bezel - your inner bezel seems to be chrome. another hint that the case could be wrong and maybe an explaination that the outer bezel doesn't move.

so again: 15630 silver dial is very, very rare - and more valuable than black dialed versions.

if you want i can mail you photos of my old 15630 silver for comparism

best wishes from vienna

Tino

: Hi All-

: Just acquired this piece and wanted to confirm the model #. Serial
: is 245656 between the lugs. Also I was wondering about the
: bezel, which does not move. My understanding is that it should
: be bi-directional. There is also a very tiny gap when the second
: hand revolves--my caliber 15 Calculator does not have that. As a
: new Autavia owner, I would appreciate any comments.

: Thanks.