This 19A which holds particular significance as it was my very first vintage purchase. In my father's late years I traveled out to visit and he gave me a box of all his mechanical watches. I found a watchmaker in Cincinnati to service them and we developed a relationship. He offered this 19A, I bought it and have enjoyed it ever since. Purchase was probably 1999-2000. I believe this scan came from my watchmaker back when he was using a flatbed scanner! 14KGF, security ring secures the caseback and, as has probably been mentioned in other areas of the Longines forum, the 19A is a remarkably reliable, accurate runner. I'll find the appropriate thread and post up the other Longines I have owned. Cheers, thanks for looking.