Rigging a 'Marine Nationale' elastic strap for fixed bars 

Most MN elastic straps on the market are designed for use with spring bars. Here is a quick and easy way to adapt these straps for use with fixed bars, like CWC divers and chronographs.
Better off doing this with a cheap one and not a really expensive one. And do take care, the video involves knives and blowtorches so , safety first!