Thanks for the speedy reply to this old thread we are revisiting. This 2100XP that I attached pics of just came onto ebay about 24 hours ago, I have seen alot of these saws, the sticker does look very original to me.
eBay item number: have to ask seller to post pic of serial number tag or just type the serial number in the auction.
also this saw on ebay from canada with same 2100XP decal sticker.
eBay item number: this one clearly shows serial number tag MIA and seller states that looks like newer crankcase installed on this unit, looks like an original rewind though.
I just acquired a 2100cd serial number 6090679 that appears to be a very late model 1986 I believe, and it has a chain brake clutch cover with the silver and blue small professional sticker in the upper left hand corner and the large silver and blue decal in the center of the clutch cover and this cover with these decals I thought only to be on the 298xp and the 2101xp but could have been put on this late model original or it may have been changed out as well, so this chainsaw I bought is how I got into searching internet today for some more info on these big bad boys, I have several more 2100 and 2101 but I have not researched my serial numbers of those yet, getting cold out and winter removal of yard stuff has husky collection saws harder to obtain than usual in the small shelved barn shed.
That serial number points at 1986 week 9, provided the number tag is "silver" and not black.