Vintage O Scale Chicago & Northwestern Railway Berkshire Steam Engine by Lobaugh 1940-1950's .Sold RTR for about 175.00 ...most were sold as kits for about 125.00 ...brass kits that needed talent to create a good looking model. The Berkshire was Lobaugh's most successful locomotive, some 2000 kits/ engines were sold...which in the O scale world is a huge number.
This model ..nicely built , runs well ...a few paint chips ...front pilot not happy with a 48" radius ...
Please see link for Berk in action