J P Engineering is an English firm, The mower has a lot of alloy in the frame and the fueltank is a small alloy unit sitting 1/2 way down the handlebars where they come together. I'll e.mail you a photo, Joe. got your address.
It's a pity we couldn't help - but understandable.
The description by the member tells me this was a JP Super Simplex, perhaps the most expensive small power mower sold on these shores. They are regarded by many as the 'Rolls Royce' of reel lawnmowers, not an unfair comparison I would think.