The Cumbres & Toltec Railroad is one of several tourist Narrow Gauge railroads that operate in Colorado. "OM" is actually the number of this Rotary Snowplow. The OM from my notes was built in 1889 and was hustorically assigned to Chama. I believe the OM was the oldest narrow guage Rotary Snowplow built. At the time I took this photo this was in working condition.