cover 12c Black, 24c Lilac (69 two, 78 two), two singles of each used on separate 1863-64 covers to Great Britain representing 24c single and double rate covers, both 12c stamps on one cover are tied by ms. cancels, both 24c stamps on other cover tied by grids, latter with 'U.S. Army Laboratory, Astoria, L.I.' printed imprint, portion of address ms. deleted, small faults, otherwise fine lot, Scott retail $435.00