What is the difference between a rangefinder's projected and reflected framelines?

Question

In a rangefinder viewfinder, how do reflected framelines work compared to projected framelines?

Answer 1

To quote from post by Brian Sweeney in a thread with a similar question on rangefinderforum.com:

Reflected lines are painted on the viewfinder, such as in the Nikon S3 and Canon P.

Projected lines are overlaid on the viewfinder using a beamsplitter. The Canon 7, Leica M, and Nikon SP are examples. ...