There is only one camera that truly belongs on a watch forum. This one.
Made in the late 1930’s by LeCoultre for Compass. Here’s what it looks like all folded up.
It was advertised at the time as being about the size of a pack of cigarettes. Unbelievably complicated to use, but had every feature known at the time.
Please note that I do not own one of these wonderful cameras, but I have witnessed one in action. All pictures from the internet.
There is a great page on this camera at
Hodinkee, with a fantastic sales video showing all the features...