Lets see some MVOs. Here is mine. Don
You're right, I probably messed up a few pictures. Sorry.
Nevertheless, your MVO is before 1917. The transition from gold
to silver plated took place in late 1916. Your MVO is probably an
early Hemmerle.
MVOs with silver plated medallion always have a broadened rim on
the lower cross arm.
The manufacturer would have to be found on the back of the Agraffe,
where the silver stamp can be found.
A Leser-MVO is eliminated as Leser has another belt thorn in
medallion,like Weiss and He