This is an attempt to send a pic of OH shearing - hope it comes through ok. It does show the blades he uses but if you want a close-up I will have to go and do some photography. That pair are Burgon & Ball, who do various models. Really the only way to choose hand shears is to go and try them. I find, having small hands compared to a man, that I need shears with a very light spring action, otherwise my hands give out before the sheep is shorn. Also if the spring is very strong there is the temptation to hold the shears too far along the blade, which leads to a poor cutting action ie too many little clips using just the tips.
The humpled creep in the picture is a Hebridean - can't see exactly who - and OH is doing the 'long blows' along one flank. He uses the same pattern of shearing as for electric clippers, although hand shearers have a variety of patterns.
Unfortunately for us the sitting on a stool option doesn't seem to work, but sitting the sheep on a straw bale has worked for me sometimes.