The 1952 Topps 1st series (80 subjects) was printed on sheets of 100 cards. Their printing press track was wide enough to print 2 identical 100-card sheets.
Shown here is the lower 1/2 of this 100-card sheet (cards #51 - 80). Since the 1st series consists of 80 subjects, TOPPS Double-Printed (D-P) two rows in
order to fill out the sheet. Evident in this 1/2 sheet are the top row and the 3rd row D-P cards (#51 - 60).
I seem to have misplaced my picture of the top 1/2 of this 100-card sheet....but, I can tell you that the D-P cards on that sheet are cards #31 - 40.
Double-Prints in top row and 3rd row (cards #51 - 60)
TED Z