Consolidating Die References For Store Cards And Patriotics

I have encountered difficulties when searching the internet for certain token references. For example, in "U.S. Civil War Store Cards", one OH store card for "Dr. Bennett's Medicine" in question is listed on p. 314 of the 2nd edition accordingly:

Number    Obverse   Reverse   Metal   Edge   Rarity   H&G
-----------------------------------------------------------------
165N-10a  500000 PERSONS (etc.)
(my coin:)
165N-11a    Same      1023      C      PL     R4     (blank)

The reverse store card die number 1023 corresponds to the patriotic number 72B. So if I wanted to construct a Fuld reference number, and search for this on the internet, for example, would I write:

Fuld OH165N/72B a C R-4

or this?

Fuld OH165N-11a/1023 a C R-4

Also, since the metal designations "a" and "C" are the same, is it customary to leave out the "C" / leave out the "a" / or list both, to be correct?

Thanks!