First off, again, I'd like to thank all those who have posted, very much appreciated. Also the info that has been given is invaluable.
That particular set was listed on Ebay for $19.95 and I was able to negotiate the price down to $14.00 to purchase it. I suspected that it wasn't a totally complete set but still purchased it anyway.
I already had previously purchased a NOS (metric) SK socket set complete, that I had found, from a hardware store about a month or so ago
( see post #46713
https://www.garagejournal.com/forum/showthread.php?p=7811959#post7811959 )
but had been looking specifically for an SK 1/4" driver and well happen to find the one pictured in my first post.
I wanted it because it appears to be in practically brand new condition and of course it came with the metal box and some SK sockets so I went for it.
Then I did a bit more research and found out exactly what the entire kit part number is as well as what the kit should contain (it is a 13 piece kit and the socket sizes are all SAE).
The following is what the kit should have as well as a picture of it.
Sherman-Klove, SK, S-K Tools, S-K Wayne
S-K Tools 1/4" No. 4913 Drive Socket Set - Ratchet, Extensions, Sockets, Driver
S-K 40970 1/4" drive Ratchet
S-K Tools 40954 1/4" Driver
2" extension, 1/4" drive
6" extension, 1/4" drive
The following 1/4" drive six point sockets; 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16 & 1/2 ( 9 sockets)
Metal Case