I've just looked through this whole thread, and though I see mention of serial numbers, both the one stamped on the BB, and the one the headbadge, I don't see anything definitive about analyzing the former. If I understand it correctly, some Cimarrons were built in Greeneville, some in Asia, but how can you tell which?
Also of course, the frames could have been made in Asia, the bikes assembled in Greeneville; that actually seems quite likely.
The stamp on the BB of the 1987 Cimarron I have is I (definitely the letter i) 626140. Headbadge stamp is 0707. The 'i' prefix doesn't seem to line up with any other serials I'm seeing here. Also, it's parallel rather than perpendicular to the faces of the BB. It's quite possible it matches the format of one of the Asian factories, but it doesn't fit Panasonic/Matsu--etc.
Any suggestions welcomed!