Couldn't find anything about them on the forums.
Here's a 1941 cat excerpt.
That's handy on my hard drive because I have a prewar set. Well, partial set, anyway. Missing the SVP-402 and SVP-405.

In terms of configuration (number and types of chisels and punches and their sizes...), this set pretty much remained the same for decades, if I recall, with the same part numbers, but you could always go to the catalog research tool at
the 'Collecting Snap-on' site and scroll through the catalogs closer to your set's production era to find out more about your set. Also,
@Old Radar has a super nice, super clean set in the original pouch around the same timeframe as yours, which he has posted on the Snap-on thread
here.
Always a tough question to answer. In the wild, I would agree with OTG that the midget sets are definitely scarcer than standard. I have a couple sets and some orphans, but many, many years walking flea market aisles. I wouldn't know about ebay or the like.
The first one looks broken or ground down,
The first one at the top appears to be original in all aspects.
I'm going to have to agree with RJ on this. Unless they made a special extra short one, the SVP-402 was always about the same length (3"). As you know, ALL pin point punches are fragile, 1/16" diam. is extremely fragile, as are ALL small punches in general. I don't think I have ever found a set from any maker that did not have at least one tool that was chipped, clipped, broken or re-ground. (Tangentially, it's interesting to note that these midget punches and chisels were one of a handful of items that Snap-on never included in their famous guarantee, for that reason.) I suspect it was broken and a PO did a very nice job of putting a nice factory-like finish on the tip. But, I could be wrong. If you're that sure, maybe you'll find something in the catalogs. It's possible it's a special and they used the same P/N, I suppose.