My Counter-Strike: Global Offensive knife history:

#20 - Shadow Daggers (★) | Boreal Forest FT - #1 #2 #3 #4
#19 - Stattrak Gut Knife (★) | Doppler FN P4 - #1 #2 #3 #4 #5 // The best knife I had... so far! :D
#18.1 - Gut Knife (★) | Doppler FN - #1 #2
#18 - Butterfly Knife (★) | Scorched MW
#17 - Gut Knife (★) | Tiger Tooth FN - #1 #2 #3
#16 - Flip knife (★) | Damascus Steel FN - #1 #2 #3
#15' - Gut Knife (★) | Fade FN - #1 #2 //Qzak's knife just for screenshots
#15 Bayonet Knife (★) | Rust Coat BS - #1 #2 #3
#14.1 - Stattrak Bayonet M9 Knife (★) | Forest DDPAT WW - #1 #2 #1
#14 - Butterfly Knife (★) | Urban Masked FT - #1 #2 #3
#13 - Gut Knife (★) | Doppler FN - #1 #2 #3
#12 - Huntsman Knife (★) | Scorched MW - #1 #2 #3
#11 - Bayonet M9 Knife (★) | Scorched FT - #1 #2 #3
#10 - Flip knife (★) | Damascus Steel FT - #1 #2 #3
#9 - Gut Knife (★) | Stained FN - #1 #2 #3
#8 - Gut Knife (★) | Night MW - #1 #2 #3
#7 - Gut Knife (★) | Damascus Steel MW - #1 #2 #3
#6 - Gut Knife (★) | Night MW - #1 #2 #3
#5.2 - Butterfly Knife (★) | Forest DDPAD FT - #1 #2 #3
#5.1.1.1 - Flip knife (★) | Black Steel BS - #1 #2 #3
#5.1.1 - Gut Knife (★) | Urban Masked FT - #1 #2 #3
#5 - Bayonet Knife (★) | Forest DDPAT FT - #1 #2 #2
#4.1 - Bayonet M9 Knife (★) | Forest DDPAT FT - #1 #2 #3
#4 - Huntsman Knife (★) | Urban Masked FT - #1 #2 #3
#3 - Flip knife (★) | Forest DDPAD MW - #1 #2 #3
#2 - Gut Knife (★) | Urban Masked MW - #1 #2 #3
#1 - Gut Knife (★) | Forest DDPAT MW - #1 #2