Get the 136 & 137 with sheath box and paperwork. Those are from the early to mid 70's. Notice on Haebbie's model 136 it reads; Patent number 326---. That patent can be looked up and information found out about it as to when it was applied for, ect.. The same model was offered prior to a patent being awarded, thus earlier. The only difference will be the stamp is worded 'patent pending'. Hence, no patent was yet awarded only applied for. It normally takes a year or 2 before a patent is granted. If only once applied for. Then on Haebbie's 137, notice his has a wedge at the end. I've seen them squared off in that area as well. Early outdoorsman learned quickly to use that wedge for splitting a deer's pelvis or small wood by malleting it thru. Did Buck make it with that intention in mind? Some early members will need to answer that one. But a similar device is marketed today named for that purpose by another company. So, I'm guessing it was. You hang on to an old pair of shoes long enough they come back in style. DM
