Swiss Watch Fair 1968 BF 54
Thanks to the special steel of its waterproof case - which reaches 6.5 to 7 on the Moos scale or 1120 Vickers (i.e. harder than quartz), this watch is stricly scratchproof. The sapphire glass is also unalterable. Automatic movement with ball-bearings. Calendar. Exclusive model. (RODANIA “Scratchproof”)