Just to close out the topic of light leaks I was experiencing in June, I seem to have solved the problem. Using a systematic approach I did the following:
1. Fixed a loose latching mechanism that was not allowing the rear door to completely seal. The catch mount in the body was bent and some discreet tapping straightened it out
2. Applied more black velvet sealing tape in the film cavities where the metal seams are.
3. Fixed a pinhole in the bellows. I used Tulip fabric paint and it did a great job.
4. applied black wool yarn in the recesses of the back cover.
5. Taped outside front seams temporarily
6. Taped outside rear seams temporarily
I shot a roll of cheap film taking a couple of shots between each step. The result indicated that the bellows pinhole and the internal velvet tape in the film cavities did the most good. The outside taping was not necessary. The leaks disappeared except for a haze on the right side of the developed pictures.
I bought a box of 25 small led battery lights and put 4 of them in the camera and closed it up. In a dark room I could see a glow deep in the front of the opened camera alongside where the bellows attached at one side. This was the leak causing the remaining haze. I applied Tulip fabric paint in this seam all around the edge of the bellows io body joint on the inside. Another roll of film and I am very happy with the result. This Iskra came from Pennsylvania had been given the ruby window mod, and the film advance mechanism is removed by a previous owner. I now feel I can confidently shoot more expensive film. Thanks again to those who suggested repairs.
This is before the repairs
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This is after the repairs
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