The 1242 has a sub reference KH22 (1242 has a 7 jewelled brooch and as you mentioned is copper proof)the 1242 KH22 ists as
Struck from current die, with K added before dot (so only 1 dot) on the shoulder
K on lowest fold of drapery
Brooch with 6 square jewels
Wreath has 11 leaves but no branching views visible
Tie ribbons show 1 loopmwith 2 loose ends, not straited
Small rust spot to the cheeks and another Ron lower lip
REV
Middle prong of trident points to left of first limn on N
3 raised dots on rock
Shield has thin raised rim
14 leaves olive branch
Ship has a poop with very small flag with 3 or 4 very minute relief gunport (pic isn't great to see this detail)
It could be another variant, but was throwing it out there as my ballpark reference