I believe the Prussian Daly serial number situation is complicated enough that those who know don't want to put it in print. The German Gun Collectors Association have some catalog reprints and have had many discussions on their internet sites, but never dare to print a "chart" of serial numbers by year. I hope I am wrong, and such a chart does exist.
I don’t think it’s some conspiracy. It’s that there are at least two and most likely three different series of serial numbers and there is no definitive documentation that connects a particular serial number to a particular year. The different series of numbers are thought to be sequential. i.e. it is thought that one series ended and a new one began around when the German proof laws changed and Lindner was forced to change his own marks.
However there is no proof. It’s conjecture based on the examination of a number of the guns and their marking.