For sale from my own collection a 18K UG Compax cal. 285
The serial number and case reference are clear and correct based on Sala's book, which features the same dial in the same case with a similar serial number. 1333xxx dates it to 1946.
The 36mm case is minty, with razor sharp lugs and bevels on the pushers. It does not appear to have been polished.
The movement is clean and the time function runs. But, the chrono function is a bit fickle - sometimes runs, sometimes doesn't - and requires a service.
$3300 includes shipping worldwide CPT