I got one for my 21 birthday £98 new from chubs of Edgware a weeks wages then 46 years later I still have it lost the open sights but still has a 4x32 kasnar wide angle sitting on top bought same time ....now looking tired but still shoots fine .....has had two piston washers and one new spring in that time great rifles
yours looks a mk1 with plastic trigger changed to alloy later