Denver & Rio Grande WesternRotary OY - March 1961 Rotary OY - March 1961 Engines 481 & 499 - Chama - March 1961 Rotary OY - March 1961 Rotary OY - March 1961 March 1961 Rotary OY - March 1961 March 1961 Rotary OY - March 1961 March 1961 Rotary OY - March 1961 Rotary OY - March 1961 Engines 494 & 499 - March 1961 Engines 481 & 489 - March 1961 Engines 481 - March 1961 Engine 499 - March 1961 Rotary OY - March 1961 March 1961 Engine 481 - Marh 1961 Rotary OY - March 1961 Rotary OY - March 1961 Rotary OY - March 1961 Rotary OY - March 1961 Rotary OY - March 1961