https://www.germanhuntingguns.com/archives/archive-heym/

You'll find Heym's patent info in the above link to Dietrich Apel's website with the most adept custodian Larry Schuknecht.


Förester was more of a firearms merchant rather than a maker. He had to source Heym, or a Heym contractor with the skills for the patent, for the 3 trigger Dreiling. They are uncommon.

Serbus,

Raimey
rse