Warwick
I have absolutely no idea what year the mower is from but 30-40 years old sounds about right. The only things i can tell you is that the motor has the number E8207 on the crankcase just above where the crankshaft comes out and it has a British made Zenith Carby - type 13 TCA-2 and the original paintwork was a dark green.
But apart from that I have no idea what model it could be.
Tom
