d'Este countermarks (really Gonzaga)
M&M
52 (6/75) VHV. HQP. 874 ancients on 52 ppl +
2 E + 2 ppl of color enlargements. 263 G, 555 R, 56 Byz.
Antinous
(33), d'Este
countermarks (now thought to be Gonzaga) (24),
Roman Republican (228)
See Boon in Coins and the Archaeologist with a note on the Gonzaga family. (I can't find it now.)