Dear TIF, Steve, and Ralf,
All in my trays I always save some free place reserve the next coming coins, ...
Each place has printed documents underlay the coins the same size like the the coins is...
I have also a number of the coins but that number are two different number the first dedicated the rulers the second dedicated which the number of its coins and how many examples and variations I have...
and
Paralelly I used a "coin organizer"
software which included all details and I have to
search for each detail ...
...because after several thousand coins very complicate to memorized everything...
Regards
Joe/Q.