I just happen to have a spare one of those, new/unused in the original felt-line display box and with the original paperwork.
The only thing not 'new', the original owner apparently filled out the warranty card and mailed half of it in. The remaining stub has the purchase date written in, "March 13, 1976."
Serial number is 08494.
I'll post a few scans if you're interested.
I'd happily trade it for a Grand Dad's Old Timer II (G.D.O.T. 2) Stockman or a Grand Dad's Old Timer Sharpfinger (152GD), in similar condition.
Or I would take into consideration a trade for any other unusual or limited edition Old Timer knife.