Jim Johnson Airguns of Norbury South London would have sold you one for the vast sum of 62.95 going by their add in the Airgun World Annual 1983 either calibre. How many takers would it have had when they were also selling the 45 at 64.95 in .177 or .22 or for 66.95 in .20.

A standard HW35 was a mere 56.95

I remember adds for the 35S in AGW at the time and I think Gedfinn on here may have had one for sale recently.