This is Koh-I-Noor mechanical clutch leadholder 5201, 2,0mm, yellow
Mechanical propelling pencil, metal, used for common writing and drawing with lead of 2mm diameter. The lead is moved by pressing the sharpener knob in leaned pencil position, which opens the clamp and the lead is slid out as needed. The lead can be sharpened upon screwing out the knob that includes the sharpener. Pencil envelope is made from hexagonal 0K7 profile, varnished with yellow paint. The pencil has a clip.