X-hallmark maker ICR or IGR ca. 1800

[Theoderich]

there is an interesting spoon with a X-mark as hallmark and makersmark [ICR] or [IGR]?



an other spoon with IGR-Mark ans X as hallmark


a spoon from 1795 with IGR-Mark and same 12 -mark like the other spoon


any idea?
Makersmark IGR looks similar to makersmark of Joachim Georg Rahm from Rostock.

[Theoderich]

It is Johann Georg Richter and Johann Christoph Richter in Niesky ca. 1790-1800
Herrnhuter Comunity