Listo:Model: #1620 MECHANICAL PENCIL Resin Body:

 BLUE BLack swirl body

clip Steel

4 1/2 inches LONG

Twist knob on top-turn- pushes more lead

Manufactured in USA by Listo Pencil Corporation, Alameda ,California

writes on metal,glass,cellophane or glazed surface

Wipes off with dry cloth

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additonal leads no 620 come in many colors

separately listed in my items is

package of  black leads-12 small boxes-No.162