After the 1975 editorial upheaval, the (Abrax, Brabax, and Califax) took over. While different in art style, this era (1976–present) modernized the magazine.
I’m not sure which specific task you want. Possible interpretations — I’ll pick a reasonable one: a concise, engaging article-style summary and guide about the Mosaik comics issues you named (Mosaik/Mosaik Magazin Digedags Ausgabe 1/226 and Abrafaxe 1/355), plus notes on obtaining fixed PDF editions. If you meant something else (compare issues, convert files, repair PDFs, or provide download links), tell me.
: Dig, Dag, and Digedag—three kobold-like beings. Timeframe : 1955 to 1975.
You might ask: Why PDF? Why not CBZ or CBR?
: The "Ritter Runkel" series (issues 90–151) is the longest and most famous arc in the magazine's history.