First off, I am jealous as I do NOT own a small yellow barlow, it is on my list....
Barlows with Buck stampings are the discontinued contracted product of Camillus Knife, contracted by Buck for an special order for a past Smokey Mountain Knife Works exclusive sale.
They are model numbered 331 and 332. They come in two sizes, large and small. They are not marked with the model number or date code. The smalls are supplied in in black and yellow sawcut scale. The large, labeled 'Granddaddy Barlows", come in three versions: black sawcut, yellow sawcut and brown jigged bone.
Some were sold by Camillus (made with leftover parts) as the factory closed down. The GD barlows from them will NOT have printing on the blade and I consider them 'non-standard'.
Not common but not rare/valuable either. Since their lineage is so mixed they have not found there place in 'history or in value'. Made with Camillus materials, not Buck Bos HT blades.
300Bucks