Gary Clinton just posted a very rare model 15 on his site (Clinton Knives), 1 of 10 his dad Tom had made in 1982 with the SF Crest, and no name etched. SOLD, that didn't take long, good get for someone.

I saw that one posted at 09:30 PM. Nice rare marked knife.
12th Special Forces abbrev. history:

Activated 9 July 1942 at Fort William Henry Harrison, Montana.
Disbanded 6 January 1945 in France.
Reconstituted 15 April 1960 in Regular Army; concurrently, consolidated with Company C, 2d Infantry Battalion and consolidated unit designated as Headquarters and Headquarters Company, 12th Special Forces Group, 1st Special Forces.
Withdrawn 14 December 1969 from the Regular Army and allotted to the Army Reserve (organic elements concurrently constituted).
Group activated 24 March 1961 with headquarters at Chicago, Illinois.
Location of headquarters changed 19 January 1964 to Oak Park, Illinois; changed 1 September 1970 to Arlington Heights, Illinois.
The Group was inactivated, along with the 11th Special Forces Group, on 15 September 1995.[2]
Many members of the 12th SFG transferred to 20th SFG following the group's inactivation.

Gary Clinton's Knife reminded me of the first fixed blade knife I was given by my Father. He had my name put on a knife given to him when he was flying SF out of Thailand in 67-68. This knife started my Blade addiction. I unfortunately used it as a throwing knife, never broke the tip in a tree but it is now blunted.