Here's my only graded card with a provenance noted on the flip -- another "Endicott NY Find" card. I also have 10 T205s that came from the Leon Luckey Collection via Heritage, but the flips are silent on that.
Here's my one certain Buck Barker card, which I previously posted last year in my thread on the dating of 1948 Bowman baseball. I also have some hobby publications addressed to Barker, and others addressed to lots of big hobby names from the 1960s to the 1980s (Lionel Carter, Irv Lerner, Ray Medeiros, Pat Quinn, Don Steinbach, etc. etc.).
