Bluegrass cutlery owns the brand name. They bought it in the early 1980's when Belknap hardware folded. They had been in businees since the 1840's.
As far as I know, three manufacturers have made Primble marked knives for Bluegrass. Colonial made some (mid range quality), but Colonial is now out of business.
Queen was contracted to make 200 each of 36 patterns in 1995. These were a "one-shot" run, very high quality. Bluegrass still has some left (apparently) as they show them on their website.
Utica Cutlery Company has made a bunch of them, including the 4-blade stockmans. These are of low to mid range quality, IMHO.
Are these knives shown on line anywhere? I'd like to take a look at them.