Webley Stingray = Hatsan 55s/60s.
Webley VMX = Hatsan Striker.
The Hatsan 900x is similar to the VMX/Striker - but not the same...
p.s. The trigger on the VMX/Striker and the 900x will likely need some work to make palatable - the trigger on the Stingray/55s/60s is the excellent Quattro unit....