Eberhard Faber Microtomic 617 Metal Drafting Pencil fine lead

This is an Eberhard Faber Microtomic 617 metal extra fine lead mechanical pencil. The color is a blueish grey with a red push button on top. It was made in Italy. When you press the red top, it opens the lead grasping holder. It has no leads but looks to take and extra fine lead. It was used but is in good condition with light scuffing, and what looks like a tiny dot of yellow glue you can see in the close-ups. The barrel is metal with gray enamel paint, and there is some wear of the paint in corners under magnification. This is an old and hard to find variant in the Eberhard Faber Microtomic line.