Just found another pic of a catalog while browsing ebay. I don't have much knowledge on the pre Benchmade models, but from the little bit of searching that I did, it appears that there was a knife called the "Monarch", model number 905/906. The pics I saw referring to those particular model #'s appeared to have smooth plastic or wood scales. In the pic below is the "Monarch II", model 915/916/917, they appear to have the textured rubber grips, but don't have the gold shield that your particular knives have. I haven't seen any reference to what steel was used on these models.