Hi kaufmann, the Minolta Auto-Spot 1 is a classic, the first one-degree spot meter. It was introduced by Minolta in 1968, though I'm not sure what year mine was made. As such, it does not have the features of modern digital spot meters (as photobizzz points out above).
This meter displays a dial inside the finder that shows many aperture/shutter speed combinations for the object you are metering. Basically, you sight the object, focus on it, and then push the button. The dial then moves to the correct range of aperture/shutter speed combinations you can use for the given ASA. Then you pick your exposure.
For example, I just metered the wall of a house across the street. Looking at the dial in the Auto-Spot, I see that if I use f/32 (for depth of field), my shutter speed would be 1/15th. If I want to use f/5.6, the display in the Auto-Spot shows that my shutter speed would be 1/500th. [good zone-master that I am, my actual exposure would be to open up a stop more, since I would want the wall to fall into zone VI]
More about the Auto-Spot 1 here (scroll down to the bottom of the web page):
http://www.digicamhistory.com/1960s.html