A pic of yours would help, but here's what Rob Cook lists (and that I know about)
3x13 Jazz Combo in wood 1960-1970 (I've got a transition badge one and they are really great little snares)
From 1970-1991 there was a 3x13 metal shelled version called the "Piccolo" when it was introduced in the catalog. Not bronze, but the same metal as Supraphonics of the day. This sounds like what yours must be if it has a blue/olive badge. It should have a chrome finish (same as a Supra) and "sideways" lugs.
After a gap, another 3x13 snare was introduced in bronze (with a bronze finish) and a similar sized black beauty. But this isn't in your time frame. Bronze 3x13 don't appear in my 1988 catalog so they would be some time after that.
The wood Jazz Combo and "Piccolo" both have "sideways lugs", while the later ones from the "bronze age" have vertical lugs I believe. The 3x13 snares have had vertical lugs during this century at least. I used to have one of those which was also very nice, but I sold it when I found the transition badge one.
Here is a sideways lug metal blue/olive from the section on snares, although this one mysteriously says it is 4x13 rather than 3x13.
[img]http://www.vintagedrumguide.com/images/my_collection/ludwig_chrome_snare_thumb.jpg[/img]
This photo comes from Ludwig snares on this page of the Vintage Drum Guide. Always a good place to start when you want to identify something yourself.
Value is highly variable ($150 - $500) depending on condition. And I haven't seen many fetch $500 since the global financial crisis. Once again a pic (or better a few pics) would be needed to see what condition it is in.