parcel gilt

A term used to describe objects that are partially gilded. For example,  the interior of a vessel may be gilded but the exterior left ungilded, or decoration may consist of contrasting gilded and ungilded areas.

Abraham Drentwett II.  Statuette of Minerva.  Augsburg. 1700-1705. Parcel-gilt silver, cast and chased. Victoria and Albert Museum, London.