Yokohama. September 20, 1934, cover to Oakland, CA, franked by four values, paying 10s for postage, cancelled by two red brown ''9.9.20'' special markings, blue three- character ''To US'' handstamp, opening remark on reverse, fresh and VF, Est. $150-$200 (Image)

Yokohama. October 12, 1936, cover to Los Angeles, franked by three values, including two stamps of Red Cross issue and New Year stamp of 1935, met altogether 10s postal rate, tied by two red brown ''11.10.12'' special ds, gray blue three- character ''To US'' marking, opening note is on reverse, fresh and VF, Est. $200-$250 (Image)

Yokohama. January 18, 1937, cover to Oakland, CA, franked by three values, tied by Yokohama ''12.1.18'' date stamps, blue three-character ''To US'' marking, no opening remark, but with K. Lewis chop in blue, two spots of soiling on reverse, otherwise VF, RES $150-$200 (Image)

Yokohama. December 12, 1937, cover to Washington, DC, franked by three values, including horizontal pair of air post stamp of 9½c carmine, met altogether 20s postal rate, tied by red brown ''12.12.12'' special marking and Yokohama ''12.12.37'' date stamp, blue three-character ''To US'' hs, marked '') N ('' on reverse along with K. Lewis chop in blue, fresh and VF, Est. $200-$250 (Image)