@paschka Based both on your recent obverse photo and your first one, I feel I can see a faint I and the beginning on an M, as well as the bottom of a C at the lower part, matching with the legend of the Galba coin @Ocatarinetabellatchitchix posted earlier. (see blue on right image) Do you see them in hand at all? Edit: You can also see worn areas where the groups of letters of the obverse legend were, which also match the coin referenced.
The C is more observable in the later image. I took the earlier image and, with some Photoshop adjustment of the levels, helped to reveal the I and (almost) M at the top a little moreso.
Dear Sirs! Thank you so much for your very interesting scientific reviews about my coin! Today I weighed her: she is 16 grams and a diameter of 11.5 mm or 2 centimeters
The weight seems to match what I expected, but the diameter is confusing to me, as I was expecting it to be more 28-30mm (you also offer 2 different sizes, too).