Vintage Walden-Worcester #3620 5/8" and 15/16" Wrench For Spark Plugs and Head Bolts on a Model T - Made in USA
Socket end (5/8") shows signs of wear, but overall in good used condition.
The Walden-Worcester Company designed wrenches especially for work on Ford Cars.
From a 1924 Walden-Worcester catalogue: "Spark Plug and Cylinder Head Wrench. Length over all 11". Socket sizes 15/16" and 5/8". The 15/16" hex type opening has been so designed as to fit down squarely on the spark plug which is not true using usual claw or open end type. The 5/8" socket has been shaped to make it possible to take all cylinder head cap screws, even the two under the dash on latest models. Used on: Cylinder head, Spark Plug, Water cylinder inlet and Water cylinder outlet." 1A