Follis Justin II Officina F

[minimee]

Dear colleagues,
ive recently bought that coin. Clearly shown is a F as officina.
It doenst look like an accident, nor as a crack in the die.
Im not sure but i guess i remember an article about coins with F officina in a german publication. But i cant remember where and from whom.
Sear 379, 30 mm/15,0 g
What do you all thing about that coin?

[Byzantofil]

A simple coin of officina Г. Officina numbers are exactly numbers, in the form of letters of the Greek alphabet.  What's with F here?  It's just a master's mistake.  For example, I saw cases of officina correction from A to D. So this is simply Г, and nothing else...