A couple days ago was the 31st anniversary of Cal Ripken Jr. passing Steve Garvey (who holds the N.L. record) on the Consecutive Games played list (at that point, Cal only trailed Everett Scott and of course Gehrig).
Anyways back that season I decided to drive down to Baltimore each time he passed someone on that list (Joe Sewell and Billy Williams were the others) and have the Post Office apply postmarks to a few envelopes because I wanted to make my own cachets. I'd apply a sticker, type some copy and then mail them out to the other players to sign and then have Cal add his autograph.
Here is the one I did with Garvey:
