Any idea what model this is?

[sebbel]

Looks like the marking say MD2148 or maybe 2143. There is pictures of the otherside so I'm thinking it might be an intercom.

[paul-f]

It appears to be a subset that's been modified once or twice during its lifetime.  The transmitter mount looks like Kellogg parts.

If it's an intercom or complete phone, where's the receiver?

Can you provide a readable photo of the wiring diagram on the door?

Are there any codes stamped into the wood (not painted or inked on) - probably along the door frame or on the back of the set?

[sebbel]

I haven't had a chance to see it yet. I'll see tomorrow but the price tag of 100$ seems a bit too steep for my liking anyway. I might just give it a miss,

[sebbel]

I've been talking to the owner of that phone I managed to drop the price lower but still a bit too much for me. I havenèt gone to see it since I know at that price I won't buy it.

From what I can now tell this appears to be a military ship intercom of sort. Which explains the MD prefix on the model number and the gray color.