After another nine months looking at a lot the main indicator being last eight over tooth i am sure (possibly wrong) now the 11 teeth is much harder to find with a normal last 8.
Michael Gouby lists BP1898B with two last eights (normal / bisect ) and although both much scarcer than 10.5 teeth the normal eight in high grade is much harder to find IMO.
Half a tooth however easy to tell at a glance due to the position.
I have seen the LCA one from three years ago infact i was the underbidder, but never another in high grade.
Does anyone have one or have an opinion as each time i spot one its always the bisect ?.
Pete.