Briko Switcher Polarized sunglasses - 2 lenses

Collector item.. vintage Briko Switcher Red Metal frame with 2 sets of lenses:

Polar Brown Lense
Lense Transmission 11%, Filter Category 3
Excellent under strong-light condition or near water.
Able to cancel the reflections coming off of horizontal surfces (water, snow and sand), a feature that makes them suitable for use in strong light conditions in sea, lake or mountain environments.

Thram HC Plus Lense
Lense Transmission 47%, Filter Category 1
Basic colour is red and its derivatives. They increase visual efficiency and the degree of image definition in poor visibility and flat light condition. Ideal for speed sports.