Hi Pam,
Hmm, OK.
Here's a little history about the Sunspot. It was introduced in 1978 and was never a huge seller. They kept it around for quite a few years (through 1983 I believe), but sales never picked up. Actual production figures are unknown, but it is believed that there are very few Sunspots in existence, possibly under 100. The majority of them were produced between 1978 and 1980, actually 1980 has the most based on what I know. The later ones I've seen very few of, yours is like one of three I've ever seen in the '81-'82 range.
The VIN history was a little weird. It appears Sunline ordered a grouping of Sunspot frames in 1978 when they started the model. Prior to the 1980 model year, the VIN's were created by simply taking a sequential production number and then following it by last two numbers of a model year. So the 1000th coach built in the 1978 model year would be 100078. Since these frames were ordered and not all were built on, they were eventually built on, mostly in the 1980 MY. Since the frames were already numbered, they added on a zero to the end, so that 1000th unit in 1978 became the 10007th unit in 1980, 1000780, though of course there weren't that many produced.
However, in 1980, new federal regulations came into play that required VIN's to be 17 digits instead of whatever manufacturers wanted. I suspect they must have renumbered the frames for the '80 Sunspots built in late 1979, but once the 1980 calendar year came around, they must have had to redo all the VIN's again.
I'd love to see what the other VIN looks like. It should start with "1LC". I'm particularly interested in how they decided where it would fit in the sequence in the year.
Also, could you confirm that RVIA number listed on that sheet (2668550), is it the same number as on the small oval plaque near the entry door?
If the VIN actually stamped on the tongue (or on an aluminum tag) is the #### and not the 1LC number, you can also remove the sill plate inside the door and there should be an aluminum plate there with the VIN stamped in it.
Thanks,
Jon