I just got these on eBay. Nice when a purchase turns out with more and better stuff than you had thought. For all I know these could all be PO-DA to DZ series (p. 290 of the book) of inlaid die-cut monograms, but maybe not the B and D. The F is part of that series (an error made in the book). The E, though, is a little different than the one in the book. The C is part of the series (no C is pictured in the book for this series of monograms).

¶ I have just that one "B", so none for sale.
¶ the "D" is new to me and the reason for the eBay purchase. I have 7 chips in all. I'd sell one for $10.
¶ I have just one extra E. I have never seen one before. $15.
¶ the others are $3 each while supply lasts -- A, C, F, G, H, J
¶ add $2 for postage-insurance.

Robert.