Lew - very unusual font on the headstamp letters. The headstamp “NANO” appeared on 6.5 x 55 mm rounds, which I believe were made by a Norwegian branch of Norma, although I could be wrong about that. A little out of my field - a shooting cartridge for me big time, but not one I collect - the 6.5 x 55 that is. However, the lettering on those rounds are quite normal. Aside from the serifs on the Thai-found round, the letter forms are strange, the letters being tapered in many places, depending on their shape. Very unusual and quite attractive in an old-fashioned way.
Bullet Master has a way of of ordering special headstamps but doing it only once. Their “normal” headstamp is “BM” and the caliber, which exists on at least .45 and 9 mm, but they didn’t seem to make much ammo with that headstamp, and I think it is quite scarce on both calibers. I believe my 9mm is a fired case, although I replaced a fired case in .45 with a loded one.
I have never seen this version of “NANO” on any caliber. BM mostly reloads other people’s fired brass.
One more to look for, although it is hard to get stuff from that part of the world. I have a few Thai headstamps, most all of which are NUPE or fired cases, and I have never been able to find the Burmese 9 mm headstamp. I had a Burmese headstamp when I collected .303, but it was a NPE case. I think there are Pakistan headstamps we don’t have, either, other than the ones from their National Ammunition Factory (POF).