After the great job Craig did, I'm going to try to post two pictures in a pair of sequential messages.
The first picture is a bitmapped squeezed image of two EV model 666 mics, the type that started this thread. The second is of an EV model 642, wearing an elastic mount for boom use. These were created with the PC "paint" program, as suggested by ScottR, however my old Win98 paint program won't save to .jpg, only .bmp.
In the picture, note that the left 666 is an older model, and it has a shorter, rounded grill than the one on the right. As far as I know, almost all production 666s had the grill type shown on the right mic.
Also notice the stand clips. Both of these are EV model 300. If you got a 666 back in the '60s, you got the left hand metal clip with plastic insert. If you got a later 666, you got the right hand plastic clip.
In this picture you can see all four of the sound entrances (yah, I know my earlier post said three entrances). The front grill is the main entrance. The large holes on each side of the head were the first rear entrances. The little "button" on top, just where the "spine" joins the head is the third entrance. And then at the end of the spine there is a fourth, small hole, entrance.
Between the mics is the female UA-3 cable end which mates with the UA-3M mounted in the rear of the mic.
Cordially,
Tom