To my knowledge a WB 63C would have had a light brown or buckskin colour column. Not black.
If it was optioned with the sports wheel the cap is the same as the HZ cap. The wheel would jace been the buckskin colour. The badge in the wheel is a little different though. The round lion badge on WB the bottom half of the lion is missing.

Sorry tried to post a photo but i keep getting an error.