Ryan:
Your Indestro #7803 12-piece 1/2" drive socket set appears on page 11 of the 1959 Indestro catalog No. 22 as containing:
One each 1/2" drive shallow 12-point sockets: 1214, 1216, 1218, 1220, 1222, 1224, 1226, 1228, 1230, 1232 (7/16" - 1")
One each #3210 "cross bar" (for breaker)
One each #3220H 11½" breaker bar
The #3201 ratchet and the extension were added to the set at some point.
The Wards breaker bar, if it is a "Powr-Kraft", was likely manufactured by Indestro for Montgomery Ward. From the photo above, it does not appear to be of Thorsen manufacture. (Wards used several different suppliers for their "Powr-Kraft" line.)
I have the same set out in the garage, but somebody added a #3275 (later production, round-head fine-tooth) ratchet to mine. (And, like yours, the #3210 "cross bar" is, of course, missing.)
The "Mechanic's Net" price for the set on the January 1959 price list is $12.50.
Best guess would be mid-to-late 1950's to mid-1960's production. Indestro was painting their boxes a light blue color previous to that time period. Taking the #3201 ratchet into consideration as an item that was added to the set, I would tend to place the vintage toward the earlier part of that time frame (but of course that's pure speculation on my part; assuming the ratchet was purchased new.)
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re: Username's comment above about the knurled band at the base of the sockets:
The knurled band is on all Indestro "Super" sockets from the 1940's all the way up to their last production runs when they closed in 1990.
Some have the knurled band (similar, but not exactly the same back into the 1930s.
The box is cool but looks like every generic Japan set.
Or currently, $0.71 USD 
