This knife is a model from extremely early in Protech's history. You can tell this by looking at the blade, which is hand ground and polished. When Protech first started as a company, their earliest knives were all ground by hand here at the shop. You can clearly see that the blade is hollow ground in the photo. These were done by WR Clark at this time. The Jazz finish was very cool, and something Protech offered for several years. Then the vendor halted the service, and Protech hasn't found anyone able to provide it again. This particular version actually has an engraving I've never seen before. I've heard that Protech had done engraved micarta in the past, which was filled with some sort of colored paint or epoxy, so I would imagine this to be one of those. Especially this early in the company history, as not a ton of units were made back then. You can bet that not a lot of these were made, mainly for the reasons I just mentioned.