Expert Help Identifying my recent UG Tri Compax 'Deco Dial' Purchase

i recently purchased this watch off a italian buyer on ebay. i had originally seen this dial a few years back and fell in love with the art deco font. i paid just over $5K

i want to know if its legit. the serial appears modified? dial looks original. hands appear replacements. case shows 18k.
references from Sala Book:
note the 12551 dial, has no 12555 reference


my watch:
ebayid: 151268559793
Movment: 287
Model: 12555
Serial: 1037XXX







similar one at bogoff:
movement: 287
model: 12551
Serial: 959XXX
http://www.bogoff.com/wrist/6240.html


similar one from Chrono24




Another one found at a previous auction

thanks Lou! and thanks all for their help over the months

Beautiful dial !