Picked this up from Ebay. Nice Ericsson metal wall phone. Everything seems original and date back to 1907-1910. The black paint shows some wear, but overall looks pretty good. I can't seem to find much information about these metal phones. Can anyone help? This one is stamped Ericsson Mfg Co Buffalo NY on the front. Pat. dates on the front is Aug 25 1908, July 27 1909. The label on the inside is dated 5-29-1910. Where would these have been used? Interesting Transmitter with the removable element with a Patent date 1907. There is copper plating under the black paint. What would be the correct receiver for this phone?