The reverse of this follis has a crossed Rho over the big letter M. Under the CHRISTOGRAM there's an Attached W. Is that usual? and what meaning does it have. The date to the right includes Digamma, I think. On the obverse I could detect 2 ladies holding each a cross, despite the poor condition of the coin. Thanks for your views.
Oh yeah, it took me a while to figure it out but that his a coin of Constans II, the symbol is his monogram.
Heraclius's monogram is: whereas Constans II's monogram is: My bet is that is a follis of Heraclius. See http://www.forumancientcoins.com/numiswiki/view.asp?key=Monogram...
Armed by your praiseworthy assistance, I searched for over an hour. The acknowledged "Table of Monograms"lists the monogram on my coin under number 25. There's only one example and it pertains only to Emperor Heraclius. The Sear number is S 810. It was struck in Constantinople. However this monogram (25) is listed as beneath the big letter M on reverse, whereas my coin has this monogram above the letter M, as shown above. Would that mean that the OP coin ( mine ) is not listed ??
Yes, as far as the monogram (crossed rho over attached w) is over the letter M. Thank you for this precise clarification.
Are you sure that the monogram is Heraclius'? Because Heraclius's monogram rather looks like this on reverse: (not mine): The examples are plentufull: https://www.google.dk/search?q=hera...BSwKHXCwCG0Q_AUICigB&biw=1098&bih=634#imgrc=_ I think you may be wrong, or perhaps me.
Q.G. is perfectly right. Actually an Emperor might have more than one different monogram on his coins, depending on the Mint or even the date or denomination. You may check this on the table of monograms which is included in the link above within the first reply of Q.G. Numiswiki... Good Luck.
Sorry about the late response, its been a very hectic day at work. As @7Calbrey mentions, there are several versions of the monogram and the ones illustrated by Sear is available at http://www.forumancientcoins.com/numiswiki/view.asp?key=Monogram. I think it is prudent, as a Byzantine collector, that the following free resources are available to you: Catalogue of the imperial Byzantine coins in the British Museum, Volume 1 Catalogue of the imperial Byzantine coins in the British Museum, Volume 2 Katalog der byzantinischen Münzen