New Claudius Incoming- bronze disease??

[Ben C4]

I have an order on the way for a Claudius as that I picked up for a good price. Up till now I have been fortunate enough with my small collection to avoid bronze disease, and I also haven't handled any coins that are affected by it. Since I don't yet have the experience of identifying and treating it, I was hoping some of the members could take a look at the seller's picture and determine if this coin might need to be treated for BD when I receive it. If so, do you have any tried and true methods that work for you?

[Ben C4]

Also, I have seen this coin listed elsewhere as a dupondius. Can anyone verify? Thanks very much for the help

[SC]

Hard to say if it is BD or not.  Depends on how soft and powdery the green stuff is.  But there is certainly a chance that it is BD.  Otherwise it is the remains of a patina after it was chemically cleaned, stripping most of the original patina.

Personally, I would start with working on it with a cut down toothbrush and then advance to a soft brass brush and see what comes off.  But very gently.

SC
 

[Pekka K]

Dupondius on OCRE: http://numismatics.org/ocre/id/ric.1(2).cl.95

Pekka K

[Ben C4]

Thank you for the advice SC. I wasn't initially too concerned with the appearance, but the reverse has made me question if that buildup is a trouble spot. I'll have to get it in hand to see how powdery it is. At the worst, it was fairly inexpensive and will potentially give me some experience dealing with BD. If I find that it needs treatment would you recommend soaking it in solution until every bit of patina is removed?

Hard to say if it is BD or not.  Depends on how soft and powdery the green stuff is.  But there is certainly a chance that it is BD.  Otherwise it is the remains of a patina after it was chemically cleaned, stripping most of the original patina.

Personally, I would start with working on it with a cut down toothbrush and then advance to a soft brass brush and see what comes off.  But very gently.

SC
 

[SC]

I'd just give it a clean with brushes and see what happens.  There may not be any spots that are active.  Hard to tell.

SC

[Ken W2]

Otherwise it is the remains of a patina after it was chemically cleaned, stripping most of the original patina.

 

Agree it’s hard to say about BD without the coin in hand, but another possibility is it was chemically stripped, the pitting lightly smoothed, and then treated with Jax which only partially took. 

[Ben C4]

Thank you all for the suggestions! I will have to post an update once I have the coin in hand. If there's no active bd then I'll be happy with a good purchase. If there is, I'll see what I can do to savage it.

[Ben C4]

I have the coin in hand now, and the amount of green deposit doesn't appear to have changed from the seller's photo. I haven't gone over it with a brush yet, but I scrubbed those areas with a q-tip to see if the residue was powdery. Only very faint traces of green showed on the cotton leading me to think it's either not BD or that it's not very active right now. What do you think? I imagine it would still be wise to keep it separate from my other coins.

[curtislclay]

OCRE is incorrect. Claudius' middle bronzes are differentiated by their reverse types.

Dupondii: CERES AVGVSTA S C

Asses: CONSTANTIAE AVGVSTI S C, LIBERTAS AVGVSTA S C, or S C Minerva advancing with spear and shield.

[Ben C4]

OCRE is incorrect. Claudius' middle bronzes are differentiated by their reverse types.

Dupondii: CERES AVGVSTA S C

Asses: CONSTANTIAE AVGVSTI S C, LIBERTAS AVGVSTA S C, or S C Minerva advancing with spear and shield.

Thank you for clarifying that, Curtis!