Have you considered a portable sundial, or is this a fashion question?

I’m having a look at Sternglas as I love the Bauhaus style but don’t want to break the bank: https://www.sternglas.com/products/hamburg-silver

Oh lordy you picked the wrong hobby if 300 is breaking the bank lol. You can get some similar to the watch you posted from citizen. They have some nicer Eco drive watches that are powered by light which is nice and they’re fairly stylish. I’ve got a few I love as daily beaters.