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SA/SPG Col. S.P. Gibbs 1936
S/N 1-80 did not have any stamps.
S/N 81-78,000 1936- October 1940
S/N 81-3,888,081. Rebuild program. December 1947-June 1950
Verified Cartouche of an Early "Skinny Letter" SPG
Image Courtesy Rick B.
Verified Cartouche of a fatter letter SPG Rebuild
Image Courtesy Rick B.
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