The engine number is 50328.
I think the only bikes that got the TT carbs were Interceptors and Constellations.
Intercepters never had the TT carbs. The end of TT carbs on the Connies was '58, then they went to single or one and a half monoblocs, like the first Triumph 500 Daytonas. The Connie Engine in the Berkeley cars had a TT carb in '59.Bare