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It would be good to read the thoughts of others, but I would go for John Pollock (Grimwade 1596). Although the 'P' is not formed properly, this may perhaps be due to debris fouling the punch.
I think Trev may have it. I too felt that the second initial could not be a T but had not got as far in exploring the other possibilities (was looking at JDs and not feeling they could be right!).