Lot
1377 
1938, 3¢ Presidential, booklet pairs and single, used with 1¢ defense (899), tied by barred oval duplexed with "Santa Fe, N.Mex., Aug 6, 1943" cds on gray cover with "P.O. Box 1534, Santa Fe, N. Mexico" return address to Detroit Mich.; minor stamp flaws, Very Fine undercover address use. Scott No. 807a Estimate $150 - 200.
The "P.O. Box 1534" was an undercover address assigned to medical staff and non-technical personnel working on the atomic bomb project. All outgoing mail was submitted unsealed for censorship, but bore no censor markings. This cover was prepaid 16¢ for the 6¢ airmail rate plus 10¢ Special Delivery fee.
Realized: $2,100