Marklin 30 VA Train Transformer-Controller 831. Tested Working.
Marklin Super No. 280A Transformer Speed Controller 220V Working
Railway Modeller Magazine, January 2020, No. 831 Great Condition
Tramways & Urban Transit Magazine-March 2007 No.831 DH
Marklin Transformer Controller 1 x 6177 and 2 x 270A
Märklin Transformer HO 278 A!
