The Victorinox Cigar Cutter tool is currently only available on a 74mm sized knife.
This tool is both a punch and a cutter, consisting of 3 laser sharpened circular hollow punches that have a slightly tapered profile with inside circumferences of 5.4mm, 8.35mm, and 10.4mm.
The ring punches are used to punch a hole into the end of a cigar, then a twist of the tool or cigar cuts into the cigar and the tapered shaft helps remove a minimal amount of material from the end of the cigar, as the punch is extracted from the cigar.
The Cigar Cutter is the size of two typical tool layers in width. It only requires a single spring to operate, but the punches are extra wide requiring the clearance width of an extra layer.

The Cigar Cutter Tool on Wenger brand tools are actually more like a scissors, in that they have cupped and double honed edges for cutting off the end of a cigar.
The spring operates just like the scissors, using the main knife blade back spring.