Hi, I have one I might break, If enough intrest !
It has a double O ring pump head, & was shooting a couple of years ago,
( Thats the last time I looked at it, Exhaust valve is OK,)
I have just tried it & The inlet valve seal has gone, " Tatty " But almost working, An easy fix, Or do it & put in the sales section.
7 th rifle from the right, Cheers,
Pic-