COMMEMORATIVE COVER ENVELOPES
Envelopes. Fine. Item #52590
Commemorative covers for the deep dive submersibles; US Navy Bathyscaph Triest, Wood Hole DSRV Alvin, US Navy deep diving aluminum submarine Aluminaut, DVS Turtle, and Woods Hole DSRV Sea Cliff. 92 covers with stamped cachet dated 1961 through 1979 and one for 1998. Most are signed by the pilot and observer, with date, dive number, depth, location of dive. 7 covers with partial information or no signatures. All covers appear fine.
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