Review on 🧭 Inexpensive Survival Kit & Hobby Compasses: 12 Air-Damped Magnetic Plastic Compasses, 20mm Diameter by Dan Phillips

I think these are great budget compasses. What I like most about them is that they don't contain any liquid, so they don't fizz and become unusable over time. I also like that they have a legend below to help you find the bearing (something you can't do with most button compasses). I had two that rotated 180 degrees but not bad for that $8 amount. I suspect I can fix the ones that are knocked out with a magnet.