very, very nice Harry.
I did a cafe racer last year that had an Indian Enfield motor that was based on the 197cc Villiers. The Enfield India co had built it with squarer engine cases than the original Villiers, but the piston was a Villiers piston & the engine cases were interchangeable with Villiers even though they were squarer looking. It also came stock with a Villiers carb.