Otis 73UAL is an Otis traction elevator controller. This is a relay logic controller. This controller was used from 1940s?-1970s?.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.