G'Day, the 7-OT can accurately be dated from 1979 issue as there is a Schrade 75th Anniversary Model 7-OT with 4 pins < meaning 1904 to 1979>the 7OT Cave Bears were later tang stamps with 3 pins
But the 7OT existed before then, correct?the 7-OT was introduced at the 75th Schrade anniversary in 1979
I still have a (USA) 6OT and 7OT. I located them in my desk drawer in Idaho, a couple years after I retired from driving over the road expedited straight truck.No prob, knife learning is good! My OTs dont say China but I got them after the closure so... I now have to look up a #7 ....