The newest is the 7/16", pn SOEX14. The 9/16" is usable but the open end has been thinned a bit for whatever reason, who knows. The 1/2" is the oldest with a 1958 date code. Be sure to ENLARGE and VIEW ALL PICS.
This product would be a great fit for mechanics, home repair enthusiasts, or anyone looking for a way to learn about historical tools and their era.
