On nearly all of fly fishing/tying bulletin boards and forums that I participate in, there is usually a question on the vise from A.K. Best that was manufactured by Mackenzie (McKenzie) many years ago. There has also been very little to go by in the way of photographs on the web. With a great big thank you to M. Valbano on the Washington Fly Fishing fly tying board we now have a very good visualization of the A.K. Best fly tying vise and all of its tools.
The above photo is the full version (larger base, third hand and bobbin cradle) but from what I've been told there also was a sorta stripped down model that did not come with he bobbin cradle or third hand.
Trying to find these vises and/or the original tools today is next to impossible unless your the highest bidder on Ebay, some other sporting goods auction site, estate sale or just plain lucky at a flea market or yard sale.