Thank you for your interest in this knife. My father, Jay Bigler, a hobbyist knifemaker, was pretty much self-taught and didn't begin making knives until after he retired in 1993. He passed in 2016, but had suffered from a severe stroke in 2012 at the age of 82. He was not able to work on knives from that time on.
Before that he was prolific in the knives he produced. No two were ever completely alike.
Unfortunately, he did not catalog his knives as to when they were made or the materials that he used. The "J Bigler" semi-circle dates it sometime from 2004 to early 2012. This really nice burl-handled pocketknife is one of the best folders that I have found of Dad's. It is 3.25" closed and 5.5" opened with a 2.25 blade.It makes me glad to know how widely appreciated my father's work is. Through sales here, knives have gone to collectors in 25 states, from coast to coast and border to border. This item is in the category "Collectibles\Knives, Swords & Blades\Collectible Folding Knives\Modern Folding Knives\Custom & Handmade". The seller is "eosg-48" and is located in this country: US. This item can be shipped to United States.