U.S. Official Business / Penalty Covers, 1880-1901. Ten #10 size envelopes from Dept. of Interior (6), Treasury, Post Office, Provost Marshal General, and Smithsonian Institution. Five with various Washington, DC cancels, including. one Reg. Official envelope. Also, four Interior Dept. envelopes used with Territorial cancels (Tucson, AZ Reg. with strip of four 2c; Las Cruces, NM Reg. with 10c Banknote issue, Santa Fe, NM with 2c (cap on 2's, #220c) and Cheyenne, WY 1886 cover). One 1888 Wash. DC with letter of Geological Survey. Estimate  $150 - 200. $0