From the 452's boiler cards: It was leased to the RGS:
1943: December 3 days
1944: Jan=3 dys Feb= 6dys March sept. through December Out of service the month of April
1945: January Sept 20 thru December OS most of April and all of May through August.
1946: Jan - May July -Dec used only6 dys in July and 5 dys each Oct-Dec OS the month of June
1947: Jan- Dec Used only 5 days each Jan and Feb
1948: Jan-July Sept- Dec used 4 days in Jan and 2 in Feb OS the month of Aug
1949: Jan- Dec Used only 1 day in July OS 20 days in June
1950: Jan - Dec
1951: Jan - Nov Has return to durango but can't read date. OS Dec
Out of service from then until dismantled Pueblo 7/30/1954

An interesting item. The loco was Out of Service all of August 1948. It was used 25 days in September of '48 but shows It had a Hydro, Flex staybolts removed, Flues removed and Lagging removed dated 9/25/48

Tony Kassin