Help ID: Byzantine Justin & Sophia? 40 Nummi Constantinople? Workshop? X?

[Ron M2]

Hi All,
My first post here and not an Ancient collector so bear with me. I was recently given this coin and have done some research on it. Appears to be: Justinian & Sophia - (Large M) 40 Nummi follis, Anno X (year 10?), CON (Constantinople mint), workshop  ? Not sure what the triangle is. Thoughts? Are all of these accurate? Coin is much more impressive than the pictures show. Would really appreciate some help n this one.

[Ron M2]

I know the  foundry/workshop mark is often confused as an  but this one sure does look like a true  which I have not been able to locate in various fora. What makes these collectible other than condition? Year? City of origin? Workshop?

[pogh_poor]

You are correct.  This issue of their 10th regnal year corresponds to 574 - 575 A.D.  The   is the Greek letter Delta and indicates the fourth officina.  Officina were workshops within Byzantine mints.  At the mints Greek letters were used to indicate the officina from A (1st) to IE (15th).

This is a relatively common coin in poor condition.  That impairs its collectibility Pogh_poor

[Ron M2]

Thank you very much for this information.