A while back Dale published a sheet with the dates and last production price.
here is the 25OT
25OT Folding Hunter; 5-1/4"; clip, skinner 1964 1993 $48.95
Robert Clemente has a bit more info
Old Timer 25OT* Folding Hunter
A. Specifications:
1 5 1/4" closed length; wt. 6.5 oz., sheath wt. 2.2 oz.
2 Large full saber clip and one large skinning blade
3 Brass linings, nickel silver bolsters and caps
4 Unbreakable brown sawcut Delrin handles
5 High Carbon Steel blades
6 Blade lengths: 3 3/4 and 3 1/2
B. Statistics and Current Status:
1 Currently out of production
2 First year of production was 1964
3 Last date of production 1993
C. Catalog History Notes:
1 No catalog information prior to 1964
2 In 1964 the 25OT in catalog @ $11.95, first units had a hole in the bolster for a lanyard
3 In 1964 the first units had bone Meerschaum handles
4 Prior to 1964, the predecessory knife was the 225, 225-ST, or the 225H, these knives were still being offered after the 25OT was introduced in 1964
5 From 1966-1970, the handle material description changed to Genuine Sawcut Staglon, there are no catalog handle descriptions from 1966 to 1970
6 In 1971 the term Genuine Saw Cut Staglon used to describe the handles
7 In 1974 named Folding Hunter, no name was given to this model prior to 1974
8 In 1974, the hole in the bolster for lanyard discontinued
9 In 1976, the hole in the bolster was reintroduced
10 In 1989, again, no hole in the bolster until the knifes deletion from the line in 1993
D. Pricing and Value:
1 First catalog price @ $11.95, with sheath
2 Last catalog price @ $49.95, with sheath
3 If the knife were still in the line, it would sell for $66.95
4 Present day value would be based on age, condition, exact model number, and production run
5 Possible value range: $60 to $90 or more
E. Special Editions, Side Stories, Notes:
1 The tang stamp should read Schrade USA and the model number 25OT
2 This model preceeded the Uncle Henry 227UH
3 Classic Hunter body style