Value of this Kellogg phone?

[Paul Albertson]

Any advice on the value of this Kellogg phone? Two cracks in the base with a small chip missing. The box seems original, except for a short brown wire. The magneto causes the bells to ring. Generally seems to be close to original. My intention would be to connect it to my home POTS line to receive calls. Would I need an external converter circuit for it, as it does not have an internal battery.

Thanks,
Paul Albertson

[Paul Albertson]

I think I have this one identified, if this helps.

No. 700-A or maybe a 710. I found the picture and description in a 1936 Kellogg catalog. There are a few options for the Desk Set Box. This has the 5 bar set so it would be one of the two bottom models. There is a condenser in the photo above, so it seems this has the condenser option.

Any opinion on the market value of this phone?