For the Blue encircled marks, I see >>Crown over F(script)<<, which was the pre-1912 Voluntary Semi-Smokeless Stamp of the Frankfurt Proof Facility, solely using the powder Trioisdorfer; said Proof Facility at one time or for all was under Collath's Umbrella or maybe even @ his house. Following that is a load 5 Grammes of TS2 powder over what looks to be 35,5 Grammes of Blei / Schrot / Shot.
In the Purple encircled area there is the Nitro / Atmosphärenpulver over some chicken scratching(maybe >>3/07<<, so possibly a date??) I can't read followed by the number >>257<<.
I agree Ford and more than likely Collath made it as in Kindergarten Collath didn't get high marks for spelling and he proved to be a poor speller later on in life.
Hochachtungsvoll,
Raimey
rse
