Southern Railway 1643

Southern Railway 1643
Type and origin Power type Steam Builder American Locomotive Company (Pittsburgh Works) Serial number 37672 Build date September 1905
Specifications Configuration: ​  • Whyte 0-6-0 Gauge 4 ft 8+1⁄2 in (1,435 mm) Driver dia. 50 in (1.270 m) Fuel type Coal Firebox: ​  • Grate area 29 sq ft (2.7 m2) Boiler pressure 185 psi (1.28 MPa) Cylinders Two, outside Cylinder size 20 in × 26 in (508 mm × 660 mm) Valve gear Stephenson
Performance figures Tractive effort 32,710 lbf (145.5 kN)
Career Operators Southern Railway Morehead and North Fork Railroad Class A-7 Numbers 1643 (SOU) 12 (M&NF) Retired 1963 Restored July 16, 2018 Current owner Age of Steam Roundhouse Disposition Operational, based in Sugarcreek, Ohio

Southern Railway 1643 is a preserved A-7 class 0-6-0 "Switcher" type steam locomotive built in 1905 by the Pittsburgh Works of the American Locomotive Company for the Southern Railway.

In 1952, the locomotive was sold to the Morehead and North Fork Railroad in Morehead, Kentucky. Renumbered 12, the locomotive operated on the Morehead line, until the company dieselized on April 1, 1963. After the locomotive was retired, it was put into storage in one of the road's engine sheds. In 2011, No. 12 was purchased by Jerry Jacobson, who moved it to his Age of Steam Roundhouse building in Sugarcreek, Ohio. The locomotive was restored to operating condition in 2018, and it moved under steam for the first time in the 21st century on July 16.