Hi Mark, I've got a '69 flat top as well. I'll note a few similarities and differences.
First thing to think about is that your's is #183. It's commonly mentioned that only the first 100 were made with the flat roof and the first 40 were made without insulation but all of those were recalled to have in installed. This info is really based on just one article which you can find either here or another boler
site. I haven't been able to find any other reference to these early numbers. Someone else here has a flat top in the hundreds as well and the lowest vin
I've heard about is #92 I think. I think these numbers are not totally accurate, that they really made more than 100 flat tops, or, without hearing about a lower or higher vin
#, it's also possible they started the numbering at a higher number.
Mine has a centre tongue jack like yours as well, which is not original, on mine there's a mounting ring welded onto the door side of the tongue. I think my vin number is stamped into the frame just under the mounting plate for the jack, one day I'll un-bolt it to check.
We have the same roof vent, except that yours is located over the sink while mine is right over the stove.
We both have the metal support bar across the roof between the closet and kitchen cabinets. Every flat top I've seen has the same support.
We don't have the side support between the upper and lower cabinets beside the sink, I think this was added with the raised roof.
Your bunk support poles extend up past the top bunk while mine are flush with the bottom of the bunk. I imagine they got a few quick complaints about not being able to easily put a board up there to keep the kids in.
My water tank is exactly the same as yours, except it looks like somebody painted yours black, mine is white.
I'll guess your door handle is a replacement, it looks in good condition and they probably rotated the cover plate because the original screw holes were worn out and/or the more commonly available replacements I found had slightly different screw spacing, something like 1.5" vs 1.75" for the original, not sure of the exact numbers. My handle is quite pitted, the shaft had completely rusted through, and while the shape is almost exactly the same, mine has a sharper edge and is flatter on the sides.
Door hinge is original, except you'rs has bolts installed at the pivot joints. They originally were held together by some sort of large flat head rivet. Mine are both very worn and it looks like they might pop out so I'll be adding bolts similar to yours soon.
I don't have the trim along the back bottom edge, could be original or added? I've got a few dings there from accidently tipping the trailer back, with no bumper it lands right on that exposed edge.
Mine never had the insulation installed and I'll guess your sticky seam tape has been replaced - get out the talcum powder.
I've got the same 12v cigarette power supply by the cupboard light
Your sink colour looks lighter than mine, but that could just be the lighting
Otherwise everything else I can see looks pretty much the same as mine.
Mine is in rough shape but we've been enjoying it as is for the last few years