Before 1961, Victorinox Swiss Army knives included a corkscrew with a tigher 5-turn spiral, and with grooves cut into the sides.
Uses: For best results, insert the corkscrew in as far as it will go (just leave yourself a little room so you can still get your fingers around the knife). Then grip the knife tightly with one hand, hold the bottle tightly with the other hand, and pull.
The corkscrew is also helpful for other tasks, including:
This corkscrew is present on vintage Swiss Army knives from 1961 and earlier.