Neil Armstrong was 38 years old when he became the first person to walk on the Moon. He used his NASA-issued Omega Speedmaster as a backup timer onboard the Eagle, because he lacked confidence in the on-board computer.
Jack Swigert was 38 years old when he used his “Speedy” to time a critical 14 second DPS burn that corrected Apollo 13’s trajectory on its return to Earth.
Eryn is 38 , so I got her a Speedy of her own: a white dial Ref. 310