Identify this beer tap?

[aster1]

Picked these up several years ago, cleaning shed and rediscovered them, no marking to tell me what company made them. Pretty simple design, certainly ain't no perlicks. Can someone identify?

 

[MHB]

Sorry, have seen one the same set up as a gun, had a chrome bar coming out of the rectangular bit on top, the bar was bent about three or four ways so the gun sat on the tip and the bar (really weird) and I suspect very old.
Cant even remember if it had a normal D washer tip - vague recollection of it being a flat disc.
Mark