Electro-Voice K20 Ribbon Velocity Microphone Super Rare Early Edition Ribbon Mic - Working/Restored

Super Rare EV Electro-Voice K20, One of their earliest Ribbon Microphones, preceding the VR Series. I believe a very small quantity of these was made, possibly these were more like prototypes than full assembly line mics and this is only the 2nd one I've seen in 25 years. This actually has the original Ribbon Motor, crude as it is.
Circa 1930's, this mic uses an early primitive Ribbon microphone design, comprised of 2 small horseshoe magnets together, wedged into a brass holder which is affixed to brass rails and adjustable magnet bars.
I believe the magnets are early Alnico - We had them recharged.
These came in Hi -Z impedance, not sure if Low Z was even available on these mics.
The ribbon mounting system on these mics was very primitive, making Ribbon replacement difficult, we left the Motor's original mounting system in tact. ( it is a 1 screw per end of the ribbon system with that screw going through the ribbon on each end and being fastened by a nut (2/56)
(An upgrade would be a clamping system like the RCA mics with 2 screws per clamp) I'll leave that to the next owner.
When we received this mic it was in poor cosmetic and functioning condition. The Ribbon Motor was glued into the body with what looked like an old red version of some kind early epoxy. We removed that and used a double faced thin foam insulated mounting.
Ribbon microphones are Very Low Gain and require a good Pre-Amp with lots of headroom, this mic is no exception.

• All internal parts were removed and cleaned. 
• New grille cloth Front & Back
• The Original HI-Z impedance transformer was replaced with the Edcor RMX-1 Low Impedance Ribbon Transformer - ( original Transformer is included)
• Newer Cable with XLR male connector
• Body stripped and painted
• Ribbon was replaced and extra internal windscreens were added Front & Back for protection
• Tested - It has good bottom end and sufficient highs
• I would also say these mics are internally Fragile and should be used in a controlled Studio environment, NOT where the mic will be moved around a lot or used for high SPL inputs.
• If you're a Mic Collector or user, this will be a welcome addition
• Silvia Vintage Desk Mic Stand Included