Glad to help Jeff. I have a few tips, hopefully they are concise enough.
The bone craftsman you posted today has rogers bone, which was not used by schrade.
The blades are also very important in discerning, there will be differences in the shape of the blades and the way swedges are done. This is best shown with side by side knives, but for example one of the most noticeable blade differences is the 4” schrade stockmans had a swedge that went over the top of the long pull and to the tip instead of starting in front of the pull like your ulster craftsman. In 1957 schrade moved in with ulster in the ellenville factory after a fire at the walden factory, and not long afterwards the two brands blended into the same product. At that point the only differences between ulster and schrade you will see on the 4” stockmans is the swedge and pull of the main blade and blade finish with ulsters being high polished with schrades glazed, and the swedges being the same differences as aforementioned. The secondary blades were identical then and the knives used the same swinden frame. This is the meaning of the term “ulster blades” when one is referring to a schrade. They all used delrin handles at this time but there was still variation. In an ironic twist the ulsters would often have peachseed delrin while the schrades had the wavy jig style delrin. Ulster probably had more craftsman branded knives than schrade in this period but there were a lot of both, some craftsman patterns being specific to one brand and some shared by both brands. For example the ulster 58OT, schrade 855, craftsman 9472, craftsman 9553, and craftsman 9505 are all the same pattern only discerned by variation in branding, handles/shields and stainless or carbon blades. The craftsman scout knives of the delrin era were all ulster styled and occasionally you will see one with a schrade stamp.
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