If you stepped into a hardware store in 1937 to buy a chisel, the counterman would have reached into the glass countertop to pull out a box like this for your inspection. Stanley 750 chisels were some of the most popular in their time for very good reason. Sturdy socketed construction, excellent balance and steel, and good looks made them a best seller. While there are millions of these chisels still floating around out there, the boxes they came in are about as rare as hen's teeth. This is the first set I have ever seen; they just don't pop up that often.
Dating from the late 1930's, the telescoping box does have some issues. The outer box is relatively intact, with some tears and scuffing, and a spot of paint (white, of course). The inner box has not fared so well - on of the ends is missing, and the corners on that end are torn.
The two chisels are in better condition. Neither blade has ever been sharpened, and it is difficult to see any signs of use. One does have the faintest traces of rust near the stamping, but they are in otherwise pristine condition. The blade is 3 3/8" long, and the 6 1/4" from tip to socket. One hickory handle has been lightly struck, as evidenced by the cracked lacquer on the end of the leather washers. I doubt the other handle ever met the business end of a mallet. The finish on both is about as close to 100% as you will ever see. These handles never sported a decal.
Don't kick yourself later by waiting on this little bit of history. Miss out on these, and you may wait a very long time for your next chance.