Collecting knives by Blade Design/Type
This is another popular way of collecting knives. Some people like to collect Balisongs, Bayonets, Bowies, Daggers, Hunting, Clip-point knives, while some prefer to group their knife collection according to type - Military, Hunting, Skinning, Divers, Pilot Survival knives, etc.
Bayonet Colletion (Photo:randompokes.org)
One good thing about collecting is this manner is that you are not just limited to one knife brand, knife color, or era. For example, when collecting Bowie knives, one can have knives from Al Mar, Cold Steel, Bill Bagwell, SOG and others who manufacture Bowie knives. For Military knives, one can have knives from Busse, Gerber, Ka-Bar, Ontario and so on. You can also have knives from different eras like WWI, WWII, Vietnam War, etc.
Double-Edged Knife Collection (Photo:'Flak' - militaryphotos.net)
