transparant yellow screwdrivers age?

[732hess]

I picked up some Snap-on plastic handled screw drivers, they are shaped like the old four sided black handles, but are yellow and transparant. What age would they be ?

[snapmom]

could you post the exact wording one the drivers. All factory wording and numbers.

[732hess]

contor shape handle, Snap-on, underscored, SSD-146 USA, blade is not chrome, it does not have six sided drive like current screw drivers, has a flat blade contact to handle with a raised hump, second is contor shape handle same Snap-on, underscored, SSD-205 USA, with pocket clip, back side pat no 2101171, handle is round going into handle.