Hello Emanuele,
It's a "K". Yes, that's makes it
Sear 1005. In D.O., I can narrow it down to #66 but I don't know if it is 66a, b, c, d, or e since I can't make out the
officina. "a" has an unclear symbol above the
though. One example of a 66b has a
cross bar on the
but it also has a double
exergual line. Only one
officina example is listed for 66c and it has a
star above, but of course more examples with "K" can be out there outside of the D.O.
Collection. 66e is actually unknown illegible officinas, not the
officina though
is listed in
Sear 1005 for the year this coin was made. #66 makes it Year 7 (647-648 AD) and I believe I do see the "
I" in the
exergue. The
officina letter follows it. The upside-down
on the
obverse legend "
N T
TO NIK
" is also a feature that shows up on several #66s.
Kevin