In 1903, Baldwin built a light three-foot gauge 2-6-0 for the Merida a Peto in Mexico that was numbered 12 and named “Catalina A de Casasus”. It carried the works number 21935 and belonged to the Baldwin type 8-20 D 115. The wood burner weighed 52,000 pounds, of which 43,000 rested on the drivers. At 45,000 pounds, the tender was not much lighter than the locomotive. The railroad became part of the Unidos de Yucatan in 1908 and the locomotive was renumbered to 62.

Five more locomotives were built in 1928 which were nearly identical, but burned oil and were 5,000 pounds heavier. They carried the numbers 75 to 79. 62 was retired in 1948 and 75 and 79 followed in 1962. The other three were sold to the Unidos de Sureste. No. 260, the earlier No. 76, was sold to Disney in 1969 for service at Disneyland in Anaheim, California. For this it was rebuilt in 1971, renamed to “Lilly Belle” and received the number 2.