These are scans from b&w negatives or Scala positives. They are toned in Photoshop in attempt to match tones I used to achieve 15-20 years ago when I had a darkroom and lots of time to experiment. Some of pictures in the series are dated back to late 80-s. I have no opportunity to replicate it now, so it's a bit of cheating on my side.
I have a portfolio on APUG with large format pictures. Most of them are scans from actual prints I made long time ago. The toning is not consistent from one image to another as it was all experimental, normally leaving a print for a long time in a very old toner or a mix of different old toners. They are made on Soviet papers using toners available in Russia at that time. I am slowly returning to my love of yeasterdays and start shooting and even doing some contact prints under a desk lamp now (couple polaroids in the portfolio). Please take a look: