These were all purchased uncarded, primarily in the late 70s & early 80s. The hardware store where I bought them didn't carry any more, and I couldn't find others elsewhere. i've never seen any at garage or estate sales.
I have more variants to the Workmaster screwdrivers than I see listed here, particularly in the Robertson tipped drivers.
Workmaster 66-911 black opaque 8in Stanley Canada
---------------- red transparent 8in -----no...