Hensley Shark Fin Logo Paperweight?

Description

Not sure exactly what it is but I believe the shark fin thing to be some kind of logo for the Hensley company.  I don't know what metal it's made of I think it's too heavy to be aluminum and too light to be cast iron.  Age unknown.
3.2" high
2.8" length
2.2" width
weight is 7.9 oz
Please pay within 7 days after the auction ends.  I will extend that time if you tell me in advance.