FS/FT: 1950 R423 BLUE Back Strip (Gehrig, W. Johnson, PSA Graded, Only Known Example!
 

FS $5K obo or trade for high-end Ted Williams, David Ortiz, Rafael Devers or other Red Sox.
PSA GRADED ONLY KNOWN EXAMPLE: BLUE back 1950 R423 complete strip featuring Lou Gehrig, Walter Johnson and other HOFers. PSA has only graded 14 individual blue back cards from this set (12 of which I own). The Gehrig and Johnson blue backs are NOT among those that have been graded individually, so they only exist in this strip.

Evan--do you have any other strips. I have catalogued 21 different strips, of which I have about 15. Still looking for the elusive #100 which as far as I know is still unknown.