RG 2, 5c Orange Eagle envelope, 10c Purple frank, company frank handstamped at upper left on entire to Chihuahua, Mexico, two strikes in blue of "F.C. Rio Grande, Sierra Madres Y Pacifico, Casas Grandes. Chi., May 10 1905" double circle company datestamp, additional 2c Red postal card to Casas Grandes with similar February 18, 1901 datestamp, a very fine and rare pair of covers, this is the only recorded example of RG 2 and one just four used envelopes from this short-lived express company