Machinist Block F A-2 Vintage Estate Item

Description

Machinist Block
F
A-2
I usually do not sell items I know nothing about, but your going to have to use your own brilliance and knowledge to make an informed decision on bidding.
I inherited a work bench from a retired engineering professor who passed in 1986. This is one of the items. It weighs 9lbs and is a little over 4 1/2” tall 1 1/2” wide 5” Deep.
Hopefully you know what this is. If you do, feel free to give me an education:)
Condition is "Used".
Shipped with USPS Priority Mail Medium Flat Rate Box.