Mystery Snap On nut driver

[3baygarage]

Picked this up last weekend expecting the handle to read Snap On, Par-X, Blue Point, or maybe if I was lucky Schwinn Approved.

I cleaned the dirt off and it says none of the above

Just the number 555A and 3/16 for the size.

Anybody seen this one before?

 

[Plombob]

I have a Par-X screwdriver with the same handle.

 

[3baygarage]

I have the classic Snap On nut drivers and had a nice Blue Point screwdriver set I sold with the same handle.

Kinda wish I had kept them.

 

[CouchSpring]

I have the 555A and a no. 33 11/32 both unmarked.

 

[CouchSpring]

Here are my two drivers.

 

[3baygarage]

CouchSpring, any clue as to the origin or what the brand is supposed to be?

Doesn't even appear that those two belonged to the same set with the different numbering systems.