Hi Guys,
Could you help me to explain what '352' symbol as below stand for? Many thanks

 

Let us know what you find out.

Words of the day, "Poinçons de Maître"

Where the rest of the watch, we like pictures..

Cheers Pat

 

Its a Poinçons de Maître

http://www.vintagewatchstraps.com/swisspdm.php

"Marteau sans manche" : Hammer without handle, or hammer head. For gold and platinum watch cases made in Switzerland outside Geneva.
352 Serva SA

 

Especially connies @habrisbane

 

Is that case back white?
More pictures please !