c. 1902-1910+ Here is a beautiful example of a Keystone
Fiddleback. This model, as well as most all phones and phone
parts used by Keystone of Philadelphia, was manufactured by
American Electric, with Keystone models having specific
identifiers. This model has very distinctive markings and
lines making it a favorite among Keystone collectors.
There appears to be at least three variations of this model.
First, the patent (pictured above) for this model which is
dated 1902. Second, in the 1910 catalog, there is an actual
production version like the one displayed above. Lastly, I
have seen examples where a Keystone dial was integrated into
the phone, an update likely performed by the company in
order to keep existing equipment in the field and
operational en-lieu of becoming obsolete.
NOTE: It took me many
years to complete this example. It is all original, having
the wood refinished and metal parts painted/nickeled to
original type specs. The receiver cap is marked Keystone