Lot
3155 
Green River City, Wyo, Oct 8, 1885, bold strike of cds duplexed with four-ring target cancelling 2¢ red brown entire to Minersville Pa., Very Fine. Estimate $200 - 300.
The post office was established in Sweetwater County Aug. 26th 1868. The site was selected as a camp and shops for the Union Pacific Railroad with the name changed to "Green River" on August 27th 1887.