The crown on the back side of the watches. There are many samples in this category, however, the most of them, that I found, were vintage ones. Good examples are Jaeger LeCoultre (JLC) Futurematic and Bulova Accutron 214, both submitted to be by fellow WUS member SkooterNB. (Thanks!)
- JLC Futurematic
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUmbLT1Hj2I1z_yUmMAmCm4n68ZNB6yoyWO9b0k5-ayNjHuW1GCNbsdcBacnuKJ72YivexFnHp-SkmDz0S_bzCvxwRbgfN988AANdJFog03MimjqQ-D5dH7ABAzs8m4uIcnqrkebYrkMzG/s320/3746948206_2e0ff44d92.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjIA3M54oVyeBYeQEy4fV528QBqcRYmzoiPffTAtUPR44k5li2dSkygHoeA9FFu65zEct-qmniOIrohpc9H_wDQC2Sr4OqrItFMnakzPDNXtuSKsa9EXHju-0lYd5kcqd9s8i1WIy-4UIjW/s320/1966Accutron007.jpg)
I remember seeing a great post or article about how these crowns are supposed to work, but I have problems finding it again. I'm going to look through my bookmarks and browsing history and put a link to it.
See the complete list of crowns on watches here in my blog.