It had a unique shock protection system where the balance wheel spokes where in the shape of a spiral in effect making the whole balance wheel a shock absorber. Wyler called their system incaflex.
This watch from the late 60’s has a stainless steel monocoque case with a gold plated bezel. It uses the very good gold plated ETA 2777 movement. This watch is signed five times including a watermark “w” in the centre of the glass.
A very nice watch.