I use a system of my own that dovetails the ACC, for uncataloged cards. This would be
Pc-Unc 1922 (Exhibit type) Heilmann
BTW, there are other cards that are even less cut and dry as to classification. Here are a few 1940 Crowley's Milk cards. (and my worst scan in a long time...the cards are the same size) I have them in 2 different places on my site, Pc-Unc and F-Unc.
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