I suppose you can say most airguns are a copy of an earlier gun, but I was thinking of these the other day.

The repeating Gamos with a tube on top of the the cylinder, copies the Relum Repetier https://forum.vintageairgunsgallery....elly-repeater/

The Gamo Falcon and Center pistols with the flip out tap copy the Relum Hurricane https://forum.vintageairgunsgallery....tols/#post-653

And the Gamo Cf20 with the pop up tap, copies the little Bsa Merlin https://forum.vintageairgunsgallery....lin/#post-2337