In the early period, the numbers seemed to have referred to one model, but with many styles allowed within that number, and later there were many style numbers for one model. Therefore I have taken to calling them "Model And Style Numbers". You'll see what I mean when you look at the updated list.
The years I still need to fill in are the 1920s and 30s, but I'll take anything from the 40s and 50s as well. It all helps for cross-checking purposes. For instance, the 1960 repair parts manual still has some parts for Vacs listed because they were re-used on the early models of 51s. And many parts, such as bushing rings and cap-jewel screws, etc., were re-used on many different models, so it's as if some pen parts were cross-pollinated. I'd also like to see what numbers were used for the Parker 75, and I'm also curious to find out when the numbering system petered out and was discontinued.
This is just an interim list, and I have made changes to it already. So remember, it is already outdated and full of mistakes. ;~)
George Kovalenko.
P.S. Originally posted at Lion & Pen, "Pens Past".
Wow George. That is VERY cool. I haven't caught the Parker bug fully and it gives me a light feeling in my stomach. It kind of makes me want to go ebaying.