Bernard there is indeed a wide variation on how the Manchester glassworks used the registration system. For some they register the shape, others the pattern, others are for distinctive one off pieces.
With tableware you get three main variations
- one piece registered, but actually a whole range produced
- several pieces registered of the same design spread out over multiple registrations, for example, the Molineaux Webb greek key designs
- many pieces registered under the same number. Molineaux Webb registration 209414, from 1893, shows 12 pieces on a single sheet, and registration 251393, from 1895, shows 25 pieces on the same sheet.