OMasch rank

[John R.]

M metal patch

The "M" patch with better photos.

[John R.]

Reverse

[amiklic1]

Also not sure what the last numeral might be.

I vote for 6, look at that curved top line ;-)

[Laurence Strong]

John, That is a great collection . Do you have an example of one without the cloth backing to show how they were put together??

Here you go