What time is it? Watches and horology

loads of needless scales

Wait until you need to do CPR while clocking laps and timing artillery strikes. THEN you'll understand.

To be fair! Mine only have slide rule bezels, which I still use pretty regularly!

Though why you'd want 3 concurrent tachymeters is mystery to me. To be honest, I've never found a valid use for a tachymeter on a watch. And even then, a slide rule can easily take care of that! (Though to be fair, just realised one of my Seikos does have a tachymeters scale crammed in there also, point taken...)