Hi everybody. I have inherited a dual-tone Longines ref. 4179, with the well-known 12.68z movement, which, according to Longines (and I would like to thank them a lot) has been shipped on 4th March 1939 to the Italian agent Ostersetzer. It was in quite poor conditions, but after a cleaning of the dial, a service and a new crystal, I think it is now satisfactory. Here's the "before" and "after". Hope you like it.