Identity troubles

[martini1215]

I have been given a nice old .177 spring gun,it has very little to identify it stamped on the body and I wondered if anyone here might help me to find out what it is. Its about same size as a Webley Jaguar but definitely isnt one,the stock has a raised comb on the cheek piece and the compression cylinder has no marks on it apart from a serial No.(?)A20523 on the left hand side right at the front just near the hinge pin,on the block at the rear of the barrel where it hinges there is a small circle on the left side with what looks like a capital M stamped inside it, I have stripped th main body out of the woodwork and there are no further markings which would be hidden under this,there is a sling swivel level with the rear of the barrel and another on the underside of the butt. It has a single piston and spring,single stage trigger , the rear sight is a leaf style v sight slid into a dovetail on the reciever and the foresight is a solid tapered inverted V again slid into a dovetail and on the muzzle end the fore end of the stock is chased out to make a channel either side for your fingers,the cocking bar has a pivot in the middle of it instead of just being a single straight piece
Its been puzzling me for a few months now and I would love to be able to find out what it is Thankyou Neil
I posted this in General Airgun and Air Tech suggested I put a post in here too,there are some photos in there as well and some suggestions but it seems to want to stay unidentified at present

[Garvin]

Dave's identified it as an early Relum:

its a early relum from the 60's i had 1 same as when i was a kid good little gun

dave.

[martini1215]

Many thanks for all the help and thanks Dave for setting my mind at ease now,,I can stop searching through books and get on with shooting again
Neil