Western Electric upgraded some of their older wall phones and candlesticks in the 1940s with a more modern receiver that had better sound quality. It was the 706A bakelite receiver with an HA1 element.

The same element was used in the F1 handset. With this element you can hear very clearly verses a magnet type receiver. The 706A was used to update 653A wall phones and older candlestick telephones. Comes cleaned and polished to a nice luster.