Phone Identification and how to open

[Bob R]

I've had this phone for years, never needed to open it as it was just on the wall as a novelty.  A while back I opened an old Crank Bell Box and found a NOS spare crank inside.  Does any one know if this actually takes a key or is it just a specific sized screwdriver.  Thanks

[Key2871]

I can't imagine that it needs a key to open.
Have you tried a #0 flat blade screwdriver?

[Jack Ryan]

There is a key but a screwdriver works too.

There are reproduction keys available I believe.

Jack

[Ktownphoneco]

Bob  ....  Ken & Jack are correct.     I'm attaching a picture so you can see what it is your aiming for.    Try and get the screw driver blade into one of the slots indicated in the picture and turn the lock to open.     Ignore the "terrible" attempt at the replacement locking cam you see on the back of the lock.   Somebody probably broke the factory cam off the back of the lock trying to pry the door open and decided to do a poor job of fabricating a replacement. 
What you see in the picture is what is located under the key opening and trim plate on your wall telephone.   Click & double click to enlarge.

Jeff Lamb

[Bob R]

Just wanted a little advise so I didn't damage anything.  Thanks guys, I got it and found a key that works perfectly. 

[Jim Stettler]

If the plate is held on by small screws , I remove 1 and use a screwdriver to turn the latch. If the plates has rivet nails then I would try small screwdrivers.
These  were designed to latch  shut, they weren't trying to be secure.
JMO,
Jim

[Key2871]

Good deal, nice job Jeff. (I'm not even that far yet)

[tubaman]

I'm struggling with the concept of having a phone for a few years and not opening it!
The minute I get a phone it has to be opened and inspected to see what I have. Waiting is just not an option.

Oh, did you find anything interesting inside it?

[HowardPgh]

The key for that is just a flat piece of metal shaped like a lower case letter T.  the width of the shaft is slightly smaller than the hole in the lock' s faceplate.

[Jack Ryan]

These are Ericsson keys:

https://www.ebay.com/itm/133070056595

But they probably fit as well.

Jack