Hey. I’m a little late to this party, but since I don’t see any replies I’ll share what I know.
These “Gent’s” folders were made in his Springfield, SC shop. He moved there in 1986 from Aiken, SC.
After his move, he started the serial numbers over and began to use a separate set per model. In theory, this means you have the 54th gent’s folder he made in the Springfield shop. I would guess that puts it somewhere in the early 90s.