In my country we would say "OMFG!!"
Rick, that's a master piece of analysis you provided to me. Merci beaucoup!
It's definitely really nice from you to have shared your knowledge in such a detailed way.
Only the name of the lady who assembled the drum is missing now and I wouldn't be so surprised to read that one of you has the complete listing of Gretsch Drums employees to match with S/N.
Now the ball is in my park: I have to disassemble this kit for the "cleaning of the century", change heads and provide you with some nice pictures.
Rick, thanks so much again for your help.