Not mine (I wish! but too small a frame for me) but I came across this image somewhere, an order sheet for a Hetchins in 1963. Sorry it's not a receipt -- should I take it down?
Somewhere I think I have the receipt (from original owner) for a 1984 Moto Team Champion that I bought, and still have. I'll see if I can dig that up. He was a teen racer.