Yes Tomo We would assume so,but many members have voiced opinions in regards to a reversal of the models due to inncauracies in the Manuals.. I have 4 now and a few more image/serial examples,so Im trying to get any clues I can with serial and others directly from the mower.

The real trouble is they ran side by side,so while the numbers may be in sequence,they are shared by 2 models. I have some examples of lower numbers on model 9s and vice versa. But in my opinion they are more than likely the way we have always known them to be smile Pretty much everything else is known about sheerline...So I dont think there will be any other great mystery.

The main clue in this Ad is the date,And as you said the term "First Release" Also they were still selling Specials" up until and even after this date. So I think this shows that this may well be the first AD Depicting A "Correct Model 6". I Really think this is enough to verify Its accuracy And should be treated as such until Someone could prove conclusively That it is not:) Case closed?