I have seen the Olean Cut mark on several Olcut knives and I have a KA-BAR marked Mariner's knife with the Olean Cut mark on it. It is another Union Cut mark. Olcut last appears in my 1937 Union Cut price list, it is not in my 1938 price list. Yours has a jigged wood handle which was used in both the Olcut and KA-BAR marked knives. I don't think you had to rush to get the BIN, it had been on the bay for some time before you got it, and I think you got a good deal. I do not know the model number or name for this one, some of my Olcuts are etched with the model name but these don't seem to have been etched. By the way, there is a genuine jigged bone one like yours on the bay right now for short money but not quite as nice condition as the one you just got. In my opinion the bone ones are nicer. The jigged wood KA-BARs do not bring the price of the bone ones and this applies to Olcuts as well. I would say your knife was made in the 1920s-1930s, can't narrow it down more at this time. Although I have the most old Union Cut price lists and KA-BAR brochures known I have never seen an Olcut brochure or catalog, but have seen hardware store ads for them. Keenwell (also spelled Keenwel on some knives) appears in the 1938 and 1940 price lists so that mark was still used after the Olcut brand was dropped. In most cases the Olcut and Keenwell knives are not as heavy duty as the KA-BAR marked knives of the same era. Don't know if you got the stainless Olcut that was recently sold with the other type wood handle but I was surprised at how cheap it went for, it was in sweet condition. E-mail me if you need more info or wish to discuss this topic further.