#474 Lot 501 Mercury

Sigma 7 recovery cover issued and cancelled to mark the flight of Wally Schirra, signed in blue or black ink by five members of the 6594th Recovery Control Group. In fine condition, with faint show-through of envelope adhesive on the reverse.
Important Notice ALS - Autograph Letter Signed
ANS - Autograph Note Signed
AQS - Autograph Quotation Signed
AMQS - Autograph Musical Quotation Signed
DS - Document Signed
FDC - First Day Cover
Inscribed - “Personalized”
ISP - Inscribed Signed Photograph
LS - Letter Signed
SP - Signed Photograph
TLS - Typed Letter Signed

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