The original version of the Victorinox Altimeter Plus is a bit simpler than the modern Altimeter Plus, with fewer of the small "add on" tools that slide into the shells (there is no pen, tweezers or straight pin).

This model is no longer in production. It is recent enough that we don't consider it a collector's item, so we sell it for a few bucks less than the price of the standard Altimeter Plus. This might be a good choice if you really don't need the pen, pin or tweezers.

Altimeter Original-- no wood saw
Altimeter Plus-- adds pen, straight pin and mini-screwdriver
Huntsman-- no altimeter
Voyager-- replaces altimeter with digital clock, no wood saw

The Altimeter knife is only available in ruby translucent shells.