Casio M5610U with a metal mod I picked up for $99 and I love it! Pick up and go with never a care for durability or accuracy. World time across 5 presets, that you can swap back and forth with your home time at a press of buttons, solar powered, and radio receiving for auto updating of time and date.
What's your cheapest watch in your collection?
This watch I got from my teacher after fixing it. It had an ETA 2391, and I actually got it to 3bar water resistance! Which is, if you know vintage watches with the “waterproof” mark, is impressive. It’s the perfect watch for me, at 34mm, and I wear it regularly. Especially in bad weather when one would like some water resistance.
https://preview.redd.it/c4jv053kc6wb1.jpeg?width=3024&format=pjpg&auto=webp&s=783737f80244bdc70d8e053c1f3ba5b0d22ba66b