Stevens Walden metric nut drivers

[coolford]

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. 

[Bill Houghton]

Given the era, I would expect metric nut drivers to be rare birds indeed!

Nice get.

[Plyerman]

They look sweet. About how old do you figure they are?

[coolford]

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.