Hi
Having something with straight lines instead of curves has a different appeal.
I've got one of the obvious choices

Despite its rectangular shape - there's an awful lot of curves present!
A couple of my squarish watches - predictably both alarms.

Omega Memomatic

Seiko Bellmatic
Both very much of their era too.
One contemporary one that I keep looking at is the Nomos Tetra. Comes in a range of sizes & colours. Particularly distracted by the green one at the moment.
Cheers
JML