Rhinemetall 77x230R?

I have this 77x230R headstamp on a trench art case that I am removing dents from for someone. Am I right that “Rh.M.F.” stands for “Rhine Metall Fabrik”?

If you can’t see the headstamp it reads:

Rh.M.F. 34
FEBR. 1909

Rh.M.F. stands for Rheinische Munitionsfabrik.


Thanks for the Quick reply Mathias.

Mathias and Falcon - actually, the name of the company was "Rheinische Metallwaaren- und Maschinenfabrik, D