Vintage Magnetic Chuck Set Up Blocks Steel Brass And Copper

Description

Vintage Magnetic Chuck Set Up Blocks Steel Brass And Copper.
I have never seen one with copper, so I will say it is likely copper, the pins are brass for sure.
From a retired New England machinist, near where many great tools were manufactured: Starrett, Browne & Sharpe, Greenfield Tap & Die, Pratt & Whitney, Union Tool Co, Millers Falls, Stanley...
Examine pictures for condition and details, ask questions before bidding please.