maximillian is similar but it's not

Maximilian  Suggested by Baki the Builder 

Custom made.
Maximilian is the colosest you can get to the original lettering on the dagger.

Looks like a light weight version of pre-digital Maxmilian, a distinctive design by Rudolph Koch from about 100 years ago.
Most digital versions are heavy and crude.
Some good info at:
https://fontsinuse.com/typefaces/31639/maximilian
The Helzel/Delbanco versions, while not a 100% match, could work as a substitute.

It's like Maximilian Bold

The phrase _Meine Ehre heißt Treue_ ("My honour is called loyalty") is the motto of the defunct Nazi organization called Schutzstaffel (the infamous SS).

Your letters were probably produced between 1931 and 1945.
I found the original of your image on a neo-Nazi website, which shows them apparently engraved on an SS blade:

Although the letters are clearly based on the style in Koch's Maxmilian, it its possible that Maxmilian was never produced as a font with this lighter weight.

BTW, the use of this motto or variations of it is prohibited [since 1947] in several countries, including Austria and Germany