I don't claim being a 5500 expert either, but I'd really like to!
The rumour goes that apparently only about 65 or so 5500 were ever built. True or not, I have no idea, but as David mentioned, the serial numbers list goes above 144 at least (mine is #104).
Also, it looks like the 5500 were built in from 1980 until Trillium
closed, and I believe that happened in late '81 early 82. All the 5500 I've seen (in real or ads for sale) were 80 or 81. I've seen a couple listed as 83 but I don't think this is possible.
As for the weight
, note that the 5500 was made in 2 versions: Deluxe and Standard. The Deluxe version had a hot water heater, shower, larger fridge
, oven, and some other options (look up the brochure in the Document Center). This obviously made the Deluxe a heavier trailer. You can tell if it's a Deluxe by the double coloured stripes on the outside, VS a single stripe for the Standard model.
Also, some 5500 came with dual axles. Again, probably a heavier trailer.
Mine is a '81 single-axle Deluxe. The previous owner added a lot of useless (to me) junk in this trailer and made it a heavy pig. When I bought it, I ran it on a scale and it was just above 3000lbs empty
. In my renovation project I'm confident I'll be able to shave at least
200 lbs from this weight
(which is probably a reasonable weight for an empty Deluxe), and keep it below 3500lbs loaded ready to go. A Standard model would weight about 2400 lbs, but this is my guess, I've never actually weighted one. I've read claims of 1700 lbs, empty but I can't see how this could be possible.