Robert Martin and I were discussing the Connecticut copper with a B / D.CP counterstamp shown in the October 2, 2016 issue of The E-Sylum.

We agree on an attribution of 1787 Connecticut copper variety M16.1-m for the image submitted by Bill Groom.

Robert also recalled two other similar pieces illustrated in the Stacks March 1994 Sale. A 1785 Vermont Ryder 4 cataloged as lot 375, illustrated on page 37 (image attached) and a 1785 Connecticut M4.4-D cataloged as lot 105, illustrated on page 16. This latter piece was also auctioned off in the Stacks Perkins sale of January 2000 as lot 199.

Unfortunately, Robert and I do not have any information on the counterstamp itself, other than what is viewable in these images. Hopefully one of The E-Sylum's other readers can provide more insight.

We hope this information is useful to help with the Colonial Counterstamp Mystery.

I cannot provide concrete answers, but I have the identical counterstamp on a 1785 Vermont landscape, attached. Ex Stack’s, 13Jan09, Lot 7216; earlier Stack’s, March 1994, Lot 375). This may support a New England origination.

My suggestion for DCP.

D = abbreviation for "penny", from the Roman denarius.
C = Church
P = penny

Similarity of script of D and P propose a link in meaning, and repetition of the amount from the L/S/D system is reasonable given the circumstances. Using "D" to represent Dutch does not work; however, there might be a connection via the Dutch denomination "duit" roughly equivalent to an English "penny." If correct this implies a multinational congregation, but is difficult to reconcile with colonial religious practices of the 18th century.