Vintage 1940 airplane gauge radio altitude U. S. Army Air Force Roller Smith WWII

Vintage 1940s WWII radio altitude airplane gauge. Not sure what it is from. Made by Roller Smith. Measures 3 5/8 long. Face is 3.25″ x 3.25″. In good condition with some surface rust. The item “Vintage 1940 airplane gauge radio altitude U. S. Army Air Force Roller Smith WWII” is in sale since Tuesday, November 26, 2019. This item is in the category “Collectibles\Militaria\WW II (1939-45)\Original Period Items\United States\Other US WWII Original Items”. The seller is “party-store” and is located in Southfield, Michigan. This item can be shipped worldwide.