This model was advertised as a low-cost, multipurpose microphone particularly useful for inexpensive P.A. systems, home tape recording and paging systems. The Model 915 can be used in any position, in hand, on a table, on a stand, or overhead. 

A pressure, crystal type microphone with a uniform frequency response from 60 to 7000 cps, is omnidirectional, and has high impedance output levels of -150 db

The case is high-pressure diecast zinc with a brown satin chromium finish and comes with matching model 415 stand.

Microphone measures  7.6 cm (3 inches) tall,  5.6 cm (2.2 inch) wide and 2.5 cm (1 inch) deep

Stand measures 7 cm (2.75 inches) wide and 7 cm (2.75 inches) tall.

Cable is 1.524 m (5 foot), shielded single-conductor.

Microphone is Untested but looks to be in very good condition.