The Dianakopf (for .800 minimum fineness here) is setting the date range. These are very blurred images of the marks, so...based upon what you have given, you need to determine if there is a city code in the Dianakopf (Mark 3 with 5 lobes) and start from that location using this chart:
https://www.925-1000.com/Faustria_02.html
If Latzko is only the retailer, then Mark 2 should relate to the maker/source/origin in some way. There's still no immediate guarantee that a smith can be identified, but this is a start. Short of a better view of the Dianakopf (preferably magnified with a loupe at 10x or more), you'll need to start the examination on your end and relay what you find. Good luck.