Vintage German line bore measuring device.

Fullsize image: https://diqn32j8nouaz.cloudfront.net...e_fullsize.jpg




Previously:

Vintage West German wire strippers with unique wire stripping mechanism - GIF
Vintage watchmaker's dividing plate - photo
Vintage Canedy-Otto hand-cranked post beam drill press - GIF
Holding work in a collet chuck on a vintage Warner Swasey turret lathe - photo
Vintage saw sharpening machine working - GIF
Vintage vibrating reed tachometer - GIF
Vintage mechanical calculator - photo
Vintage razor sharpener - GIF