the ID is placed on the SS-dagger's srossguard

[Alexhip]

Hello, perhaps a wrong place to post it ?
are there any chance to figure out the person according to ID is placed on the SS-dagger's srossguard.

Thank you in advance.
Alex.

[Robert H]

not in the key, is it normal to find a 0 before the number?

[Alexhip]

Yes, it isn't. That's Why I'm asking for.
I suppose, it can't be the ID. However What is it ?

Good Luck.
Alex.

PS: I found some of those ID at crossguards at the books, mostly they contented six figures.