Plough gauges are a European origin tool used to cut straps. They are used in a pushing motion. The blade is in line with the handle and will cut wider straps more easily than a draw gauge. These come from fine European makers like Dixon, Blanchard, Vergez-Blanchard, and Mayer-Flamery.
Dixon and other British Makers
Draw gauges are used to cut leather strips. The draw gauges are from American makers such as CS Osborne, HF Osborne, and once in a while draw gauges from Henry Sauerbier and others. They have all of the gibs/shims and all come with a new re-profiled and sharpened blade.
CS Osborne Cast Metal Handle Draw Gauges
I usually have several of these draw gauges on hand. These are the cast metal handle draw gauges with steel bars and all of the gibs. They have the same blades as my other draw gauges. There isn't much if any difference between them individually and I will pick from stock. They are good affordable users. Most will have Newark marked bars with the occasional Harrison marked bar.
These are designed to put on your finger and pull away to cut laces and strings. They'll adjust up to about a a half inch. I have stripped these down, primed and painted, then sharpened the blades. These all have good blades, unlike a lot of them you find. I don't always get them with blades like these, so when they are gone - they're gone until I find more. They are all pretty much the same, so I'll pick from what I have. - $30.00