BB 33 HC

[adrianb]

Hi I have just aquired an unusual Rickman Metisse in Australia with a BSA BB33 A  HC- all alloy engine with RT2 box Magnesium hubs and front brake.
I don't know the year of the engine but believe its a 68 Rickman frame build. Looks like a specially built scramber maybe factory maybe not.

I cannot see any references to BB33 A engines anywhere does anyone know what it is and from what year?

[JulianS]

Alloy heads and barrels are listed for B31 and B33 in the 1950 and 1951/52 parts books. These would have been ZB numbered.

[adrianb]

Thanks Julian that does help