Can anyone recall these one piece mounts that were sold out of the mags in the 80s?

There was a fairly limited choice of mounts back then and I think these were on sale around the twenty quid mark (I think)? They are pretty solid with four Allen bolt fixings to the dovetails. Two smaller Allen bolt fixings front and rear for the scope clamps. But also there are two bolts that can basically remove the scope clamps away from the mount dovetail base?

I have one still in use on my 80 to this day and its zero creep. But I don't seem to see or hear of any around? If anyone can recall these do you know if they simply didn't sell that well? All my old airgun mags are sealed away in the attic and not easy to get to in order to check the adverts.

They may possibly have been for sale under the manufacturer of H R engineering???

Cheers
Dave