I have been looking for this on and off as well; it has been surprisingly hard to locate. What I am really interested to have, though, is a master concordance table linking Cohen, BM, RIC (1st editions), and RIC (current editions). This is a necessary key for navigating older articles and auction catalogs.
Aleph, how is your quest faring? A concordance table that includes
Cohen, BM, and
RIC is laudable, but a big job.
I
had quite the time cooking up a concordance table just for the
Anglo-Saxon coins in the
Medieval European Coinage series (
MEC I vs.
MEC VIII).
I found it more straightforward to compile an
index that I call a Table of Contents (or TOC) of a corpus (like several
SNG series) where these were lacking. At least I can promptly locate the coins I want.
I am working, in piecemeal fashion, on a TOC for
Sear Roman and
RIC, but these are ultimately little more than a convient bookmark or cheat sheet, since those works already have their own table of contents and indices.
To your point, the
RIC series is deficient in providing a concordance, as I suspect the other series you named. I find it disappointing that the revised edition of
RIC I lacks a concordance and generally only has a single reference, often
BMC, with
Cohen as a last resort. As for the more recent
RIC II.1 revised edition, at least it contains a concordance to the first edition and more references. I can only
hope this stays true of forthcoming revised editions.
Anaximander