30 seconds is the most I let my watch run ahead and I can't stand it losing time at all. If I know my watch loses time then I'll set it 10-30 seconds forward!

When people, especially youtubers talk about a watch saying it's "the best Rolex alternative". C'mon, a Grand Seiko or Omega or any brand have their own identity and don't need to be an alternative to some Rolex model.

For me, 5 is a nice number to fulfill all my needs, i.e., a dress watch, an everyday, a sports, a G-Shock (for high impact activities) and a Pilot watch (I just have a thing for them!). Between all the above you can have a variety of colours and most of them can be worn almost anywhere.

A modern SEIKO ALPINIST would be perfect according to your requirements.

- It's quite a vintage design with the cathedral hands and old world charm.

- The 20 atm WR makes it ideal for literally any kind of activity including even scuba diving.

- It can we worn everyday as well as dressed up or down with endless strap options.

- It has real brand heritage which would make it ideal as an heirloom to be passed down generations. Also, servicing would be trouble free and easily accessible anywhere in the world for at least the next couple centuries!