The first Workmate produced in Canada and sold in the United States was designated the Model 79-001 Type 1. The 79-001 was produced until 1982, with frequent revisions, designated by Type numbers 2, 3, 4, 5, 6, 7, 8, and 9. Types E, and 1 through 5 used a pair of cast-aluminum pivoting H-frames to support the vise jaws and to allow the Workmate to fold for storage. The aluminum H-frame gave the Workmate a very distinctive appearance and was considered to be "Hickman's greatest aesthetic stroke." By the Type 6, the aluminum H-frames were gone, replaced by ones of stamped steel. The one up for grabs here must be a Type 1-5 as it has the aluminum H-frames as mentioned in the wikipedia article above .. Comes with 6 plastic bench dogs .. 70$ OBO