No idea where to look for on this one, or if it's worth looking for anything at all. About all I see is those two date digits.
Not 100% sure that it's even a 4...

12 mm, 1.95 grams. Which is way smaller than all the options I could quickly find on Zeno.
Oh, and my photos usually aren't
that bad... dunno what happened. Not that it really matters in
this case, admittedly.