Lowe pick came much later. That is a very late model Chacal...post '82 and near the end of production. The two holes in the handle and the black rubber shaft insulation all are indicators. The two, brass tube lined holes in the handle (one for a leash the other for an umbilical) the most clear indicators of age. A quick look through a Mountain Magazine adn Simond ad's campaign will give you a better idea of the exact age. But I know Climb High didn't import the 2 hole version until the Barracuda (adze version) showed up.
I have earlier ones but not the first generation red handled and double spike one. I kept upgrading as the newest models were producted. I never appreciated the dbl spike (but would now as I would a Roosterheads dbl spike) and the full black rubber shafts and dbl holes were a good improvemt IMO. I still have my last pair and a couple of spares of differing lengths plus an axe. Same pair Simond gave away at the '79 Resembalance.
Anyone know of or have access to a good classic shot of 60s/70s tools in action on Ben Nevis or Cairngorms in winter? I am aware of Yvon's book, of course but am looking in support of another fantastic book in progress.