That's a Vintage Neumann KM-86. I got a pair for recording mainley acoustic guitar.
It's often used as a additional top mic for snare. The combination SM57 and KM-86 on top is a classic.
The KM-86 was the top snare mic on AC/DC's Back In Black (Tony Platt). The KM-86 was also the Metallica Black Album (Bob Rock) snare mic on top. Bevor all that Bob Olhsson had 29 KM-86's at Motown and recorded "everything" with it. It's one of the most versatile mic at all.
Since I own a pair of KM-86 I almost never use my pair of KM-84's anymore... It sounds huge and phatt if you have a acoustically ballanced live room. (It's not a mic for home recording since it picks up a lot of ambience) It's like a triple patern KM-84 but more smooth and gentle sounding because of the different head basket's size and shape.
That's my pair:
Thanks Glen, appreciated for that info! Love both albums & sounds. Those pics are actually from the Black Album session, screen shots from "Year and half with Metallica" documentary.