Hi all, I really need help. My camper is registered as a 1970 grey Coleman box trailer. There is only 4 numbers on the rego papers vin (CP 2283). I think it’s the Coleman 1971 580, but when I measured my camper, the dimensions are not quite the same as the original dimensions on the old Coleman brochure. I need to order a new canvas from bear creek and I need to give them the exact model. I narrowed it down to the 580 coz I can see under the rubber that previous owner put on the colour under it is “green” and on the Coleman brochure the 580 and 581 was sold in green.