Just on ebay can anyone identify ?

I just started a thread on this old brass tachometer I bought on ebay. Can anyone identify ? If so please post commet on the thread I started. I hope I’m not breaking any rules. I’m new at this thread stuff. Very good looking tachometer.
Click the photobucket like for pics.

http://s1080.photobucket.com/albums/j323/saveoursteel/consolitaded%20tch/