Abstract: A counter comprises a body housing a set of discs which are freely rotatable on a sleeve and which have numerals on their peripheries. A series of drive plates are keyed to the sleeve and interleaved with the discs. At one end of the set of discs a spring-loaded collar also keyed to the sleeve urges the drive plates and discs into frictional engagement. The sleeve is rotatable with a reset wheel while the collar is driven by a star counting wheel through an orbital drive arrangement. The orbital drive arrangement may include a further collar having outwardly directed projections thereon which engage an abutment carried by a resilient arm, the abutment and projections restraining the further collar against rotation during counting. Each disc has a set of first abutments and a second abutment on its periphery.