The Caterpillar D6B Dozer in 1:50th scale was in 2005 released within the Black Rat Model Collection.
The Caterpillar D6B Dozer in Brass and cast metal is custom made for the Black Rat Model Collection of New Zealander Bruce Rolston. There are two versions: Straight and Angle Blade that could have a D6N Hyster winch on the back of the model as an additional feature.
This high quality and amazing detailed 1:50th scale model is not available to the collecting public and therefore very rare.
If you are in the possession of photos or additional background information like the original brochures or spec sheets about the 1:1 Caterpillar D6B Dozer I would be happy if you send your response to email@example.com