What would the e-bay levers item 120785433526 have been fitted to?
The adv/retard lever is quite a bit longer than the air one.

Hi Alistair..These are BSA 'combination' levers. They were fitted to prewar BSAs, early WD M20s and some early post war bikes.
The long lever you mentioned is in fact the valve lifter lever...the advance/retard lever being a completely seperate lever.
These levers also feature a spring loaded ratchet, front brake locking mechanism. It may well be that this was to lock the brake on sidecar equipped machines and could be the reason for the 'combination lever' name....Ian

email (option): ian@wright52.plus.com

Thanks Ian,
They have gone for a tidy sum!

every time you stop you will have to take them off

Anyone have a photo of the correct advance/retard lever for this set?

email (option): unpob@yahoo.com

email (option): ahum@quicknet.nl

Nice one Henk!

email (option): unpob@yahoo.com