Gorham "Pattern M" - Fairfax??

I received a question on my AllExperts site today that stumped me. The question regarded a set of Gorham sterling flatware identified on the back of the pieces as "Pattern M". The questioner included a picture of a few pieces and they looked like Gorham/Durgin Fairfax. I've attached my own picture of a Fairfax piece below.

I would like to hear from anyone who might be familiar with the terminology, "Pattern M". Email me or add a comment below.

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