Hi Mike,
I am wondering where that information came from??


I have also seen this information:
The star under the tang usually means it was a Camillus contract made prior to 1965, Primble knives with the "Belknap" tangstamp of the same era without the star were normally Schrade.
Primbles have been made by many different manufacturers over the years.
I would agree that the John Primble Barlow looks like it might have been made by Boker, I have other John Primbles with that star on the back of the tang which appear to be made by other makers.
I was just wondering about the source of your information and this confused me a bit.

Here is a link that discusses the star stamp and I came to no firm conclusion from reading it.
http://www.bladeforums.com/forums/showthread.php/418127-John-Primble-Belknap-Hardware-knife