Microtech Combat Talon II Single Action OTF from 02/2000 with blade ground by Walter Brend.
The knife opens automatically by pushing the button, after which the blade can be pulled back with a lever inside the back of the handle.
Specs:
Length open: 21,5 cm
Length closed: 12,7 cm
Blade length: 9,0 cm
Blade thickness: 4,48 mm
Steel: most likely 154CM stainless (not marked)
Handle material: hard anodized 6061 aluminum
Weight: 112 grams