M&StL 2-8-2 No. 629 was a member of the railroad's second group of class M1 Mikados delivered by ALCo's Brooks Works in 1921; after rebuilding in the late 1930s (see the previous page for No. 606) they were reclassified to M1-46. They had 59-inch drivers, 200 p.s.i. of boiler pressure, and 25x30-inch cylinders. They produced 49,790 pounds of tractive effort and weighed 252,500 pounds. Additional specifications of the class are given for No. 631 following. This image of No. 629, which was saved from a discontinued Internet site, was captured at an unspecified date and location by a photographer identified as Prescott.