I assume this relates to clock weights. You talk about 1-day clocks or 8-day clocks depending on how long they can go between being wound. This also affects the mechanism and size of the weights.

"Gilt Mortar clock
8 day clock in the shape of a Napoleanic wars mortar. c1870. On original alabster base."

"Wooden French Lyre clock
8 day movement striking at the hour and half on a bell, with pendulum high at the top of clock. Ebonised wooden case with ormolu adornments. c1870"