I had two guns lettered Utica Fox-Strelingworth ejector gun and Philadelphia PA Grade B extractor gun. In general on Utica guns you get gun specs plus shipping date with shipping order plus price for gun charged at that time.
With early graded gun you get original specs, shipping date with destination and in my case return resold date and destination, nice hanging tag and original price for gun like yours when new.
These are nice to have especially if gun is in good to very good original condition. New buyers really appreciate those letters. I'm sure you know how I know that. I sold both guns when prices were at their height.