NEAR MINT A Guide Book of United States Coins 2020 Spiral Bound Jeff Garrett
You will notice the Model 4950 has a smooth action that still works perfectly today.
A Guide Book of United States – Paperback, by Garrett Jeff; Bowers – Very Good x
By Garrett, Jeff; Bowers, Q. David. A Guide Book of United States Coins 2020: The Official Red Book.