You're right, '72 it was. (I'm not good at dates
It's just a sort of observation I want to confirm, John. MH made "nearly all" of the Fish when he was there, (to quote Mark Hill, p.30) I don't know how many other makers were competent enough to do these. I am just wondering if there might have been a break in their making until Joseph got good enough to give them another go.
With the introduction of date marks following his (MH's) departure, I have seen them on the cube vases, (my earliest being '75) on large Ming globe vase (again, my earliest is '75), on chalices (I'm not climbing up to check) and on Fish vases, but the earliest date I've seen on an actual Fish, is '76.