Hi Ian,
Information on the 'Centenary' is very thin on the ground.
From my research, I cannot tell you the reason for naming it the 'Centenary', but in came in 2 versions, a 16" and an 18" and was first introduced in 1936.
The 1st (early) (what we shall refer to as the Series 1) I have an advert for:
[Linked Image]
Unfortunately Ian, I don't have an image of your later(Series 2) model to show you, but your pics will be great for the archives. wink
Thanks for showing us Ian,
cheers2

Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.
Kindest Regards, Darryl grin