I have been collecting Walden/Stevens Walden for about 25 years and this snatch off e-bay is the first time I have seen metric nut drivers. And, the condition of the holder and drivers is like new. Second picture shows the clear plastic handles with black stripes.
Given the era, I would expect metric nut drivers to be rare birds indeed!
Nice get.
They look sweet. About how old do you figure they are?
They must be after 1954, as in that catalog they still show wood and yellow plastic. These handles show clear plastic with black set-offs.