Old workbenches are always interesting. The benches in the cabinetmakers shop at Upper Canada Village have a number of quirky features. The first of these is the fact that the top is held together using four large through-bolts with square nuts. I imagine the parts of the bench-top were also glued, but it may not have been possible to clamp the pieces together, hence the bolts.
The workbench top itself is approximately 3″ in thickness, and is joined to the legs by means of a blind mortise and tenon, held in place by a wood pin. The base of the workbenches seems to be comprised of two sets of legs with stretchers between them joined using lengthwise stretchers held in place with through mortises, and wooden pegs. One of the benches has a horizontal stretcher under the rear portion of the bench top, with a triangular section that notches into the leg.
The main vise on both benches in the workshop are rectangular leg-vises which use wooden screws.
The bottom of the leg vise uses an adapted runner type parallel-device with a single series of holes and a steel pin.