Old thread i know Ian,( found searching archives) but i was thinking it could have been the hurricane Optima.
https://www.facebook.com/groups/7192...21379/?fref=ts Rapid 7,HW100kt .177,Theoben Fenman, BSA Goldstar,Daystate HW30S shrouded and tuned, HW99S (Paul Short tuned)
Both the optima and tasco ag scopes were made by hakko Japan and many of the models were exactly the same except for the different the branding