Lot
2016 
(Mail Routes) "Steam Acapulco." and "Steam Panama.", two partially off at top oval "Steam Acapulco" steamship marks over "Steam Panama" handstamp, on ca. 1870 cover to Plymouth, Mass., this proves these "Steam" handstamps were applied in San Francisco not in the consular offices, "San Francisco, Cal., Aug 14" cds (Williams SAF-810) with "3" due marking, endorsed "From U.S.C. Survey, Steamer Hassler" at lower left, a concession was given to Naval personnel to send letters due which waived the ship captain's fee of 2¢ therefore a rate of 3¢ normal postage if on a federally controlled ship, Very Fine. Estimate $1,000 - 1,500.
THIS DUAL HANDSTAMP USAGE IS UNIQUE BASED ON THE MEYER SURVEY.
Another view of the rating on this cover is that it was not in a Federally controlled ship (this mail was carried on Pacific Steamship Company ships) and should have carried the normal 10¢ rate.
Realized: $1,700