What is the name of the knife?

In Counter Strike: Global Offensive, we know there are a lot of knives. For example: Karambit knife, Butterfly Knife, Bayonet Knife, etc.

But what is the name of this knife from an older version of counter strike?

Solution 1:

It's a modified Strider "Badlands Bowie" Knife

This is from a PDF file:

The new Counter-Strike knife is based on Mick Strider's award winning bowie. It is an integral design that started as a 1/2" thick slab of 6AL4V titanium. The edge is press-fit Stellite, and no bonding agent was needed or used as it is held in place due to the extremely precise fit between the titanium and Stellite. The handle is fossilized mastodon ivory held in a carbon fiber pocket.

Here is another source mentioning the origin of the knives, including the CS 1.6 one.