Street Car RPOs, group of 34 with some better including rare "Chatt. Tenn. Electric Car Oct 29" on post card, "Pittsburg St. R.P.O. Pa. Oct 29 TR4 1900" duplex on cover to China during Boxer Rebellion with "Mil. Postal Sta. No. 1, China, Dec 4, 1900" arrival backstamp, "Boston Mass. 'Trip 2' Aug 29" machine cancel with "Boston Circuit R.P.O." waving flag machine cancel on post card, etc.; some faults, F.-V.F. Estimate  $300 - 400. $0 (Image)