Sewell Valley was a small coal-hauling road in West Virginia that was absorbed by the Chesapeake & Ohio around 1927. Its small Lima 2-8-2's, #6, 9, and 12, were placed in class M-1, M-3, and M-3A and numbered 2900, 2920, and 2921. They were too small for C&O's use so they were sold, likely without even being relettered. C&O M-3 #2920 and M-3A #2921 were sold to the Chicago & Illinois Midland, becoming their E-3 class #525 and 526. A heavy 2-8-2 with 57 inch drivers, based on Atlanta, Birmingham, & Coast 204. Locomotives of this type were used by shortlines and class ones. It can be relettered by following instructions in the readme and the website you downloaded it from. Tender for Baldwin heavy shortline mike.
Coal: 12 tons
Water: 10000 gallons.