Hello again Dirk,
I truly appreciate your generosity with your time and effort to support the concern that we share. I agree, the point is not for either of us to convince the other, but to discover the truth.
From your most recent links, I do see a degree of bust similarity, but the variations are large and certainly similarities can be expected. Also, your links are to issues of different rulers and periods, and mint personnel, facilities, and locations vary.
It appears to me that your most frequent concern is presence of a circle around the bust on mine. I have searched but, with typically undersized flans, crude work, and poor preservation, I can seldom if ever determine if a circle was present on the obverse die for the Ricimer issues.
However, for rulers as at your links, I do see circular borders, for example on the following coins sold by CNG (probably genuine in most or all cases to me; what about to you?):
http://cngcoins.com/Coin.aspx?CoinID=276085
http://cngcoins.com/Coin.aspx?CoinID=256819
http://cngcoins.com/Coin.aspx?CoinID=258101
http://cngcoins.com/Coin.aspx?CoinID=131521
http://cngcoins.com/Coin.aspx?CoinID=72525
In any case, fakes come in all varieties, sharing some features with genuine coins, and the presence of the circles on fakes does not mean to me that all coins with circles are fakes. I would like very much to see good images of more Ricimer-monogrammed coins, and most importantly some with the crossbar that forms the letter A. Those may differ from the type without the A, from being made by different people at a different place or time. I think that they are all likely to be barbarous or unofficial (and perhaps that is true for all Ricimer monogram coins), whatever that means when applied to the shakey Western Roman Empire as ruled by puppets.
Whether my Ricimer coins are genuinely ancient or not, they lead to study and learning (including from our discussions at this site), and I think that is their real value. They led me to investigate the A, though I could have done so without any examples in hand based on references such as RIC where it is listed as problematical.
By the way, since I found that Anthemius' daughter Alypia is believed to appear unnamed on an Eastern Roman coin probably (per RIC) issued in connection with her marriage to Ricimer, I have wondered if the A could be seen as a Western Roman counterpart with her A added to Ricimer's monogram. At this point, if the A is real and has meaning (even if to some "barbarian" die sinker), I think it is likely to be connected to Anthemius through either his daughter Alypia or his general Marcellinus; these three individuals could all be represented by the monogram with A!
I may even be fortunate enough to inspect the apparently unique coin (an RIC R5), since its Dumbarton Oaks home is quite close to me, and discuss the matter with the curator. Of course I will be revising the paper to reflect all newer information including the ideas that you have provided - so very kindly, even more since you have needed to write in English (excellent English!) to be sure that I understand.
Again, thank you!
Best regards,
Bob