Your thoughts are spot on and Stefan, @steur, is spearheading an effort to find a connection and break the code. (He has shared the data with me and I have been playing with it as well.). Here's a post from a couple months ago (first of multiple posts) summarizing his findings to date. He's created a master spreadsheet of his collection which documents the information from the tags, along with other information such as quality designation, crown height, weight, brim treatments, intended market, etc. Any contribution(s) you have would greatly be appreciated. As vast as his collection is, it is but a drop in the bucket of Borsalino. We're hoping to get more members to contribute to this database so as to hopefully find potential leads.