Another group of spark keys, from left to right:
Speed-X key, with 7/32” diameter contacts.
Made in the U.S.A.
Raymart Speed Key with 7/32 contacts.
Sold by the Raymart Craft a Creed Company, Birmingham, England. C. 1942.
Another Speed-X key with 7/32 “ contacts.
Has a different base than the one mentioned above.