Everyone is right!
Fleams might still be used by some vets, but certainly were used for a couple centuries at least.
They were used on people for a very long time too.
Not just doctors, but barbers were even more popular for bleeding.
You know the barber pole with the red stripes?? Barber shops had a dirt floor room in back and bleeding happened in there.
You grab the pole with both hands at the top and the barber lays the fleam over the vein (vertically please) and whacks it with a blood stick. A short light club.
Yes, 2, 3 and 4 blades were made. Brass, bone, horn and wood handles were all popular.
Mine ( I only have one) is a Wm Rodgers, Sheffield, horn handles, 3 blades.
yours Scott