I bought these at a show a few years ago, believing them to be 1700cc Type 4 P&B's
In the end, I went with a 2.0 engine rather than the rarer 1.7 that came out of my bus, so I have these left over.
They are in great condition and brand new, the piston tops are marked with 86.96
If that sheds any light on weather they really are 1700's or something else, please let me know.
I'm thinking of selling for about 180-200, but flexible should they not be 1700's
I'm based in Brighton and London. Can ship at your expense, but of course, they are heavy!