Gildemeester de Fremery & Co, forwarded by, San Francisco. Neat bold blue oval handstamp on blue stampless folded letter dated August 4, 1851, emanating from Valparaiso, Chile, carried per the Ship Schotel and forwarded by Gildemeester to addressee, Extremely Fine, a very early handstamp forwarder, listed but without details in Rowe. Estimate  $600 - 800. $0 (Image)