Omega

We are talking about Omega crystal (hesalite glass) used in (end of 50s) 60s and 70s on the Speedmaster (2915, 2998, 105.003, 105.012, 145.012, 145.022 etc) and the Seamaster 300 (2913, 14755, 165.014, 165.024, 166.024 etc) the 60s and 70s. To distinguish...  

Marco, I'm on this road for some time and I never ever considered this fact. Thank you very much. Cheers, Nilo

I\'m going to take a look at the Omega I have from 74. I had it serviced by omega 2 years ago and they sent the old crystal back. When I get home I\'m pulling them out to compare!

... to have an idea if a hesalite crystal was already replaced or not even on modern models is to check if the logo is standing up (when the watch is looked straight in your face). This is not an exact science, of course, but crystals are assembled on the... 

Team, Allow me to introduce "Adenoma" / Adriano. Adriano is a dear friend and I'm happy and honored to have him here. Adriano works on the watchmaking business here and his encyclopedic horological knowledge will enhance our site tremendously. Welcome Adr... 

.. but I try to do my best! I purposelly didn't introduced myself, didn't want to disturb any discussions. Hope I can contribute with the knowledge aquired over the years on both "sides of the desk". Many thanks for the welcome, Nilo! Cheers, Adriano (jus...