Knew I remembered this one, here's his post about it from a couple years ago, another Mark with a flat top boler
. Not sure he is the current seller as he mentioned in that thread he might be selling it.
Regarding the insulation, in his original pics it looks like the bare fibreglass and you can barely see a seam line where the two halves are joined together which looks identical to photos of the same seam line in mine. Almost all the flat tops I've seen have had no insulation. I imagine that even if a recall was issued, not too many owners would have bothered to bring their bolers back.
Interesting about the serial number and year, his is #123 and a '70 while yours is #183 and a '69. Probably a couple possibilities, his boler might have sat on a dealers lot and sold
in 1970 and thus registered as a 1970 model, or been registered as a '70 later in its life. Without having any actual information, it seems likely that all of our flat tops were made in 1968 and 1969.
His price does seem high, but I bet it barely represents the time and materials he's put into it. Plus, prices for bolers out in BC seem sky high, even for non-restored ones. If I ever decide to sell mine, I will be making one last trip out west with it for sure.