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Old 11 November 2018, 09:44 AM   #2
scg
"TRF" Member
 
Join Date: Feb 2017
Location: usa
Posts: 3
I believe a 3940 from 1989 would not have a sapphire case back. The 3941 had a sapphire case back . Gold Mark's could have been lost with polishing, but I was told at HSWA the gold Mark's vary with source of case
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