I just made arrangements to purchase a rather large collection of of over 1,000 U.S. revenues all with insurance company cancels (I'll be paying on it for quite a while!).
Before I start integrating it with my own collection, I wanted to capture the collection intact. The collector was very meticulous: the stamps are in alphabetical order by insurance company, and within each company by Tolman reference number. That's what the little strips of paper are next to the stamps.
Having the attribution work done was one of the allures of the collection, which is another reason for photographing it now.
The pages are pictured at the link below. Clicking on any of the images will pop up a higher-resolution version of that image.
http://www.revenue-collector.com/insurancecoll/Some wonderful strikes and usages!