Kanmuri-san no Tokei Koubou - Vol. 2 Ch. 9 - Someone Who Fits The Bill

[MangaDex]

 

[lowarctic]

daughter: “dad… why are you so obsessed with making the trains run on time”

dad:

 

[lowarctic]

Seiko 91RW

 

[Kaarme]

I doubt these days anything depends on a train driver's private, mechanical clock. There are centralised systems to monitor rail traffic and stop trains if necessary. These systems would get atomic clock time from out there, seeing how they also use GPS.