Johann Friedrich Moering from Tallinn, the son of Christian Moering (no middle name).
Recorded October 1782 as the member of foreign guild, worked in St Petersburg until 1795.
``Foreign guild`` means he did not belong to Russian assay offices, but what foreign guild with Tallinn within Russian Empire?
The local self-government institutions after 1710 when incorporated into Russian Empire ?
That would explain ``cross town mark`` and no Russian assaying.
You will excuse me for not being familiar with the issue. Clarification is appreciated.