Thanks for the
BMC Thessaly Altamura, great
help Indeed the preservation of these coins does not
help much:
As you mentioned, I thought as well that the short angle of the right hand of Apollo/Helios, indicates the move, drawing an arrow out of the quiver.
Unfortunately, that does not implicate a
style criterium, cause I present here another Ambracia coin with Apollo/Helios using a long angle for drawing an arrow, the way also
Zeus use it in order to brandish thunderbolts
Hard to say ....
Additional letters/monogramms/marks are here
Λ and
ΝBR