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# C4 (1923) Propeller Airmail - Sgl, MH [8]
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US 1923
SECOND AIR POST ISSUES
Radiator and Propeller
Scott C4
Stamp Single
Perforated 11
Mint Hinged [8]
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![# C4 (1923) Propeller Airmail - Sgl, MH [8]](http://www.robsstampshop.com/cdn/shop/products/C4MH_530x@2x.jpg?v=1629999410)