Many coin-like objects have engraver and designer marks, and they can be the initials of their name. The guidelines https://en.numista.com/help/unabridged-legend-obverse-reverse-and-edge-127.html and https://en.numista.com/help/translation-of-the-lettering-obverse-reverse-and-edge-128.html say nothing about these.
Could be supposed the initials are included here, but there are fields for engraver and designer.
I thinking, for example, in objects of the series https://en.numista.com/catalogue/series.php?id=59. All these objects have similar lettering. For example N#5072
- Obverse:
- Scripts: Greek, Latin
- Lettering:
MALTA
ΓΣ
UEM 1999-2009
- Unabridged legend: Unjoni Ekonomika u Monetarja.
- Translation: Economic and Monetary Union.
- Engraver: Geórgios Stamatópoulos
- Reverse:
- Script: Latin
- Lettering:
2 EURO
LL
- Engraver: Luc Luycx
Should this be added?
- Obverse:
- Unabridged legend: Γεώργιος Σταματόπουλος. Unjoni Ekonomika u Monetarja.
- Translation: Geórgios Stamatópoulos. Economic and Monetary Union.
- Reverse:
- Unabridged legend: Luc Luycx
In any case, the subject of artist’s initials should be explicitly mentioned in guidelines.