Rangefinder #3 model

This is a "looks like" model for the final Rangefinder, which will contain a mechanism similar to Range Rinder #2, but is asymmetrical.  It's made of hand perfected cardboard rolled around laser cut internal ribs and then affixed with gum tape.

Here are a few interface models I made to explore the positioning on the three major interactive components, the eyepiece (on the left), the range gauge (middle) and the ranging knob (to the right). The two armed model on top came from looking at British Barr and Stroud rangefinders. The final model ended up not including the right arm after the discovery of some asymmetrical Swedish rangefinders.

This is the view from behind the rangefinder. You can see the eyepiece in the center with the range gauge to right and finally the ranging knob on the far right. 

Looking form the front you can see the two prism ports where you vision would be directed out of the rangefinder.