Proto pebble code question

[Northwoods]

Came home today with 5 nice wrenches--two especially.
One is a nice patina 1942-45 CRAFTSMAN (underlined)  # 1031.
The other a Proto pebble open end in 13/16 by 3/4.  It is marked 1039-S.  What does the  S  stand for?  The wrench is 8 1/2, certainly not short.  AA is silent
Any thoughts?

[Harry Bergeron]

The S is for Special, as in special order, typically an unusual length, finish or combination of sizes. A factory or equipment maker would order these for their own special needs. They're not exactly rare, but unusual

[Twertsy]

Came home today with 5 nice wrenches--two especially.
One is a nice patina 1942-45 CRAFTSMAN (underlined)  # 1031.
The other a Proto pebble open end in 13/16 by 3/4.  It is marked 1039-S.  What does the  S  stand for?  The wrench is 8 1/2, certainly not short.  AA is silent
Any thoughts?

Funny this should come up this morning.  I was "organizing" my Plomb DOEs just yesterday and noticed one or two that also had a "-S" part number.  Looks like some research is in order.  If you're on GG, maybe ask Conductor?

[Northwoods]

Thank you, Harry. I'd love to know more about this wrench.
Does anyone know if 13/16 by 3/4" is an unusual combination for a Proto # 3039 or if 8 1/2" an unusual length?
Thanks again.

[Twertsy]

Thank you, Harry. I'd love to know more about this wrench.
Does anyone know if 13/16 by 3/4" is an unusual combination for a Proto # 3039 or if 8 1/2" an unusual length?
Thanks again.

Go to my site: toolarchives.com/ and type 3039 in the search.  3039 is supposed to be 3/4 x 7/8

[Northwoods]

So, mine is just a pinch smaller on one end.  I'm guessing that is a mystery that will never be solved.
Thanks, Twertsy!