Classic Worldtimer Manufacture

Crown-only operation is the specification — check for absent pushers

The case band should carry no correctors at all. Every function — local time, city ring, 24-hour disc, date — is set through the crown. A watch presented as this reference with recessed pushers in the case flank is built differently, whatever its dial says. This is a check that can be made from photographs of the case profile.

The city ring is a political document and can be checked externally

As on any worldtimer, the cities named and their spellings are period-specific and correspond to real time zones. A ring naming a city under an obsolete name, or placing one in the wrong zone, indicates a reproduction dial made by someone copying an appearance rather than a reference. Worldtimer rings are among the few dial elements checkable against a source outside horology.