The often-cited incident involving a crystal popping off during a Moon mission actually involved which non-qualified watch?

Answer

A Bulova chronograph

The incident where an acrylic crystal popped off occurred on the Apollo 15 mission involving Commander David Scott's backup timing device, which was a Bulova chronograph, not the NASA-qualified Speedmaster.

The often-cited incident involving a crystal popping off during a Moon mission actually involved which non-qualified watch?
watchspace explorationApolloMoon landingOmega Speedmaster