Mike,
While you were saving the family jewels, I tried to do some comparisons.
The Worthpoint decal isn't much more legible than yours, but there's enough there between the two of them to ascertain that it should have nineteen (19) sockets and six (6) handles for a total of 25 pieces. You have 26. Something is extra and taking up a hole for the uni joint.
Five (5) of the handles are the same as in the "D" set, with the same model numbers on the decal. A ratchet, two extensions (4" OAL and 1-1/4" OAL), the sliding tee, and the universal joint. I can't make out the number or the description of the sixth handle.
Some but not all of the model numbers for the sockets are legible, and most of them match the "D" set. (With one exception. In the "D" set, #44 is a 15/16" socket. In the G" set it's 11/32".) You're going to see that you have two identical 1/2" sockets. They are #45 and #46 on the decal. One is listed as 1/2" A. (for adaptor). The other is listed as 1/2" Sp. (for Special). But they are interchangeable. #48 through 51 are square openings. Can't read the sizes. #52 is that drain plug socket. Appears to be 1/2" M. (for Male). I can't make out the sizes for #34, but #35 through 41 are 6-point/hex opening sockets 21/32, 11/16, 23/32, 3/4, 25/32, 15/16 and 27/32. #53 and #54 are the Wing Nut and Alemite sockets. #55 are the Drag Link adjusters (Qty 2).
They always use that area under the logo to describe the set. The "D" sets describe the set as a range of wrenches in /32" graduations. Yours says something about S.A.E., mentions the square sockets, and then cites the inclusion of the Wing Nut, Alemite, and Drag Link bits. See Pic.