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Cuba. 1943 5th Column Issue Trial Color Proof Pa

10 different pairs (20 stamps). 1 Centavo, Scott #375 TC in brown on white paper; #375 TC in blue on white paper (issued stamp printed in dark blue green); 3 Centavos, Scott # 376 in brown on whitepaper; Scott # 376 in blue on white paper; Scott # 376 in brown on light brown very thin card. (issued stamp printed in red); 5 Centavos, Scott # 377 TC in yellow green (Issued color was bright blue); 10 Centavos, Scott # 378 TC in green (Issued color was dull brown); 13 Centavos, Scott #379 TC in brown on white paper; #379 TC in green on white paper; #379 TC in brown on light brown thin card (issued stamp printed in dull rose violet). AU to Choice uncirculated. No gum as issued. Rare trial color pairs. SBNC.