Also fitted with a dynamic element and called the 623, this cool die-cast EV mic has several remarkable components including a wonderfully made knuckle that fits well and is smooth, and a drawn plated brass end cap with the three "War of the Worlds" eyes.
The crystal element is the typical aluminum plate attached to some rochelle salt in the center.
A lot of hand work went into the deflashing and smoothing of this mic prior to plating, and then perhaps after to make everything fit well. Stated response is 60-8000 Hz. I haven't tried it but it is a handsome addition to the microphonium museum of Ashland. This EV 926 probably has a telephonic sound, if it still works. Rochelle salts are prone to damage from heat, and moisture, and this mic has been around for a long time.