I'm not an S-K expert, but:
is that 1/4" drive?
generally those 1/4" drive sets (most I've seen, anyway, by different manufacturers) came with: 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, and 7/16 (generally 6-points but sometimes a mix of 6 and 12-points, depending on maker.) sometimes they include a 1/2" (not all makers.)
most of the early 1/4" drive sets also included 1/4, 5/16, and 3/8 8-point sockets.
really early 1/4" drive sets generally contain sockets, breaker bar, driver bar (that fits in the hole in the breaker bar), and maybe an extension.
only later on did tool makers start including modern ratchets in 1/4" drive sets: that didn't happen until late 1950s/early 1960s with many makers.
later on they tossed in a screwdriver-handle-type "driver' handle.
do not do not do not do not alter/change/rework the finish on the box if you intend for it to have any "collector" value. leave the box as is. clean it up a bit, but don't touch up scratches or remove the patina.
if that were mine, I would: disassemble the ratchet and toss everything (except the ratchet guts) into a bucket of white vinegar for a couple days, pull it out and rinse it off well, dry it all and rub it down with some light oil on a rag. (NO steel wool or wire wheel!)
should clean up nice. clean the ratchet guts with light oil and a rag and put it back together.
as it sits it's a $30-$50 item on Ebay, depending upon your ability to find a willing buyer. maybe more. don't mess up its collector value trying to "restore" it.
