
The Kodak Signet 35 is a cute little rangefinder with a couple of shortcomings. One is a shutter that is a bit delicate and often needs a lot of attention to coax back to life.
The other is the rangefinder. On some cameras, you'll find that the rangefinder patch (a triangle) is no longer visible, turning your Signet 35 into a scale-focus camera.
What I found is that this can sometimes be corrected by using a piece of blank 35mm color negative that has been processed.
This page on my site shows you how to make the rangefinder patch visible. I would say that it took me about 30 minutes.
To get to the point, you insert a small rectangle of the 35mm color negative in front of the main viewing window.