Notices by Matt Mullins (mokomull@macaw.social)

@regehr @recursive @dan I forwarded this nerdsnipe along, and was directed to https://www.telephonecollectors.info/index.php/browse/bsps-bell-system/most-popular/501-components/12949-501-163-101-i2-jun64-station-dials-41-type-for-card-dialer/file in return.

it uses a commutator/brush assembly and a shockingly small amount of relay logic to decode the row/column into the right number of pulses. it needs its own AC transformer to spin that motor, not provided by the 48V on the phone line.