I'm a newbie here, and have a lot of questions about these watches.
How many is it estimated were produced?
Where can I get parts? I need crowns, pushers, bezels, and crystals.
I noticed they are rated a "B". I believe they are under appreciated, and undervalued. What are your thoughts?
Is there a serial number chart so I can tell the age?

There are several different varieties of the "3H" here. I can post individual close ups it anyone would like.

I have two more than in this picture. One is at my watchmaker, and one is missing. I don't know where I put it (not kidding)

Thank you in advance for your help!