Unbranded 9.4 P.D. B 9-3/4" Od. 2 Groove B Belt Pulley/Sheave Bushed Bore. Bot sure what bushing it uses possibly a SF bushing when I looked up the measurements, but I don't of that size bushings here to try.
This is surplus to a now closed factory that kept spare parts on the shelf the boxes may show shelf wear and have some dust on them.
[Please Look at all the pictures they are part of the description]