A rotatably actuated counter mechanism, comprising: a first wheel rotatable about a first axis of rotation, said first wheel having a first display surface extending circumferentially there around for displaying counting indicia thereon, said first wheel also having a plurality of gear teeth extending circumferentially there around; a second wheel also rotatable about said first axis, said second wheel having a second surface extending circumferentially there around for displaying counting indicia thereon, said second wheel having a foot projecting therefrom in a direction substantially parallel to said first axis; a slave wheel positioned between said first and second wheels (34,30), said slave wheel being rotatable about a second axis of rotation offset laterally from said first axis, a gear being positioned on one face of said slave wheel, said gear being engaged with said gear teeth of said first wheel, said first wheel being rotated about said first axis upon rotation of said slave wheel about said second axis, a Geneva mechanism being positioned on an opposite face of said slave wheel, said Geneva mechanism having a plurality of receptacles adapted to receive said foot projecting from said second wheel, engagement of said foot with one of said receptacles incrementally rotating said slave wheel in response to rotation of said second wheel and thereby incrementally rotating said first wheel; said counter mechanism being characterized in that: said second wheel has a wall projecting in a direction substantially parallel to and substantially surrounding said first axis, said wall having a plurality of openings (88a,88b) therethrough; and said slave wheel has a plurality of pins being mounted in spaced relation around said Geneva mechanism, said pins projecting in a direction parallel to said second axis and being engageable with said wall, said pins aligning with and passing through said openings (88a,88b) in said wall when said foot engages one of said receptacles, said pins otherwise engaging said wall, engagement of said pins and said wall preventing rotation of said slave wheel and thereby said first wheel. a first wheel rotatable about a first axis of rotation, said first wheel having a first display surface extending circumferentially there around for displaying counting indicia thereon, said first wheel also having a plurality of gear teeth extending circumferentially there around; a second wheel also rotatable about said first axis, said second wheel having a second surface extending circumferentially there around for displaying counting indicia thereon, said second wheel having a foot projecting therefrom in a direction substantially parallel to said first axis; a slave wheel positioned between said first and second wheels (34,30), said slave wheel being rotatable about a second axis of rotation offset laterally from said first axis, a gear being positioned on one face of said slave wheel, said gear being engaged with said gear teeth of said first wheel, said first wheel being rotated about said first axis upon rotation of said slave wheel about said second axis, a Geneva mechanism being positioned on an opposite face of said slave wheel, said Geneva mechanism having a plurality of receptacles adapted to receive said foot projecting from said second wheel, engagement of said foot with one of said receptacles incrementally rotating said slave wheel in response to rotation of said second wheel and thereby incrementally rotating said first wheel; said counter mechanism being characterized in that: said second wheel has a wall projecting in a direction substantially parallel to and substantially surrounding said first axis, said wall having a plurality of openings (88a,88b) therethrough; and said slave wheel has a plurality of pins being mounted in spaced relation around said Geneva mechanism, said pins projecting in a direction parallel to said second axis and being engageable with said wall, said pins aligning with and passing through said openings (88a,88b) in said wall when said foot engages one of said receptacles, said pins otherwise engaging said wall, engagement of said pins and said wall preventing rotation of said slave wheel and thereby said first wheel. said second wheel has a wall projecting in a direction substantially parallel to and substantially surrounding said first axis, said wall having a plurality of openings (88a,88b) therethrough; and said slave wheel has a plurality of pins being mounted in spaced relation around said Geneva mechanism, said pins projecting in a direction parallel to said second axis and being engageable with said wall, said pins aligning with and passing through said openings (88a,88b) in said wall when said foot engages one of said receptacles, said pins otherwise engaging said wall, engagement of said pins and said wall preventing rotation of said slave wheel and thereby said first wheel.