Portal:Anniversaries/May 15
- 1937 — The first Collective Agreement ends strife between watch workers and manufacturers in Neuchâtel. This "temporary" agreement would last over 75 years.
- 1961 — Harry D. Henshel, who lead Bulova for decades, dies at 70.
- 1963 — American astronaut L. Gordon Cooper wears a Bulova Accutron "Astronaut" watch aboard Project Mercury capsule "Faith 7" while orbiting the earth