Air arms 200

[BRET22]

Hi
While continuing the big tidy up I have come across the cylinder barrel and trigger of an Air Arms rifle. It says Air Arms 200 on the top of the cylinder and it's a sidelever with a serial number of 35931 and have no idea what model it is never mind it's age, it would be nice to get a stock for it but they probably don't make them anymore?
I know how knowledgable members are on here and any advice would be most welcome and if it has any value would be useful of course as I have no knowledge at all of Air Arms springers and only a bit about their PCP's.
Many thanks
I am sorry if this is in the wrong section but I didn't know which one was best.