WE Special Type 301 purchase

[Witty]

I recently purchased this WE Type 301 wall phone but have a couple questions.
I can't tell if the stamping is 301 A over 301 NN, or NN over A.
Everything looks completely original but it did not have the paper wiring diagram on the inside of the door, as most do.
I'm curious if anyone is familiar with this model and can tell me if it's a NN type or the A type, and if anyone happens to have a copy of the diagram I can print and add to the door.
Thanks,

Ken

[poplar1]

Looks to me like NN and 1600 OHM were added later. Is the model number also stamped on the back?

Here is a 301A diagram:
https://www.classicrotaryphones.com/forum/index.php?topic=11251.msg120167#msg120167

[Witty]

Here is the back stamp, which looks the same.

[poplar1]

I would guess that it has been converted to a (1)301N rather than (1)301NN, and that the letter suffix refers to the type generator and type ringer.

The suffixes for the 295-type subsets used as extensions on magneto service are 295-S, 295-Y, and 295-AB. So I think if Western Electric ran out of single letter suffixes, they would have used Ax rather than Nx.

[ChrisW6ATV]

I like how they used an upside-down "W" in the word "ohm", which makes it into the word "who" upside down.

[HarrySmith]

Bell System at its penny pinching best! This way they don't need to have 2 stamps

[Witty]

Very good observation!

WHO 0091