Can you give me any information about this Longines? I know it's from 70s but not sure about that and it is never worn up. Thanks in advance
1970's model, as you surmised. the "20" refers to 20 microns of gold plating. The 508 movement is taken from a Record movement somewhat modified and rebadged as a Longines movement after Longines acquired Record.
Only thing to add is the reference number - 8452 as shown on the inside of the caseback. ..... in 1961. IIRC, the 50x series are rebadged 195x calibers.
The watchmaker told me its 20 karats but I assume he did not gave a lot of thought on it.I want to buy this watch,he is telling me 1000 Euro. You think it's worth it?