Complex sentence: The best mazers had silver or silver gilt rims added, commonly prints were also added (a decorated disc in the base of the bowl) and occasionally normally on later mazers a silver or gilt foot was also added.
Split into simpler sentences: The best mazers had silver or silver gilt rims added. Commonly prints were also added (a decorated disc in the base of the bowl), and occasionally, normally on later mazers, a silver or gilt foot was also added.