Smith Glass made candy container telephones from WWI into the late 1920's. The hallmarks of their phone products were that they used glass receivers not wooden.

E&A 760 but with the SELDOM found "little Receiver". The glass to each part has a weak blue aura, yet not fully their known Cornflower blue wares, just a pale. This is how I obtained, not a marriage, the glass carries same batch recipe value.  Cog in Neck phone might be the earliest telephone variation Smith made. Smith is known for running their moulds for 10-15+ years or until damage to a mould occurred.

(how Smith paired receivers with phone models subject to how one obtains, if out of a collection it might have been a salvage off other Smith line phone and E&A assumes that only the "little receiver" would be expected to E&A 745 phone model when that is seldom the case in general). Most 745 models have the full scale rec. For clarity it is an original Smith Receiver, just not what E&A depicts.