The distinctive look of this microphone ought to give it away for anyone who has used one. The mic was made by a US manufacturer based in the middle of the country. The pattern is omnidirectional. The mic was sold unbalanced, though there was a kit available to balance it.
Follow this WordPress blog, or via Twitter or Facebook to find out if you were right, and try to guess all of the microphones in this series.
Name That Mic #1