Piko G Scale 37243 DB IV BR50 Steam Loco w/Sound Piko 37243 G Scale DB IV BR50 Steam Loco w/Sound. Our company specializes in model trains, diorama products, miniature scenic accessories, model figures, model building kits, model planes, and model cars and trucks (including die-cast) across all major scales. Black Forest® Hobby Supply Co was established in 2008 as part of Interlaken Brands. We’re proud to serve customers in more than 130 countries worldwide.