Photo Aviatik B.I

[Buckeye30]

Clint. I suspect the result depended on who was painting it , some made them more elaborate. There are 2 styles on this Albatros; the rules were followed more strictly in WW2 ( but by no means always).
I remember an RAF ground-crew telling how they hand-painted squadron code letters on their Typhoons and they all differed ( partly done to relieve the boredom). Looks like the tail numbers on your Aviatik were done by hand too.
Nick