I guess this is a name, written in Sütterlin (although Sütterlin would have much sharper points, but my guess is that is due to the writng implement)
Letters (read down)
- D (my guess is that there is a big loop barely visible). the main problem here is that it begins with a downstroke, no Sütterlin letter does that, and my guess is that a very small upstroke was simply left out -> D / N
- y / r ? completely unclear and smudged
- c / n ?
- d /o ?
- o /d ?
- r /y /s ? very sloppy any way
followed by 2364 (if the '23' are not digits, i do not know what it might be) - the joining of the 2 and 3 leaves open the possibility of the writer joining unjoined (such as uppercase) letters - so 6th could then be, for instance, a P
If you have no further context about the holster (or other known samples in the same hand) i think this will be a wild goose chase. The writing is cramped and faded, my grandmother had problems reading her own script from school-days - Sütterlin can be very multivariate