Theoderich wrote:yes - The Hallmark would fit more to Germany . But I do not think it is Hanau .
Now I think it is Hanau.
There is a spoon of Hanau Neustadt ca. 1790.
The marks are also on top of spoon.

But I think this is another spoon of the maker [HM] in Haunau.
There are two letters: AH means Altstadt-Hanau.

But I do not know the maker. There are some Goldsmith in the Scheffler-book.
HM
312 Wilhelm
Heine
mann (Neustadt) oo1827 ->to late
308b Martin
Hart
mann (Altstadt) master ca.1826 ->to late
284a Johann
Herr
mann (Neustadt) ca. 1810? ->to late
284 Andreas
Hell
muth (Neustadt) oo1818 ->to late
279 Johann Daniel
Heine
mann (Neustadt) oo1817 ->to late
277c Philipp Heinrich Daniel
Hart
mann (Neustadt) master ca. 1810 ->to late
263 Johann Chirstian Peter Möller (Neustadt) oo1812 ->to late
255B Chretien
Henri
Meyer (*1759) Bijoutier
246b Louis Cuillaume
Hester
mann (*1749) Bijouteriefabrikant
244b Johannes Meerbott (Neustadt),*1771
236 Johann Peter Mausenhold, (Neustadt), (*1767)
222b Jean Cretien Müller *1786, Goldstecher
203 Johann Conrad Hennemann, Goldarbeiter (Neustadt) oo1776
189a Johann Henrich Hausmann, Goldarbeiter (Neustadt) oo1773
180 Johann Georg Murmann, Graveur & Goldarbeiter (Neustadt) (*1740, oo1768)
166 Hermann Hofmann, Goldarbeiter (Neustadt), Master ca. 1754.
156 Johann David Holtzmüller, master ca. 1740
155b ?? Morin (Neustadt), ca. 1737
146a Johann Henrich Hennemann (*ca.1707) master ca. 1743.