Horsehide arms and trim, laskinlamb trim. Generally, they had a matching sheepskin/mouton collar, slash handwarmer pockets and a belted waist. There were, of course, drastic design differences manufacturer to manufacturer. Popular in the mid to late 1930s. They were marketed as a boys and young men’s fashion. The idea (according to original ad copy) was, with the insulation on the outside, the wearer would have a greater range of motion. I didn’t see the “grizzly” name show up when searching for original ads, but it has become the catchall term for this style.