ScientificAmerican1899-02-25.jpg ThumbnailsScientific American 1903-10-17ThumbnailsScientific American 1903-10-17ThumbnailsScientific American 1903-10-17ThumbnailsScientific American 1903-10-17ThumbnailsScientific American 1903-10-17
Measuring and testing instruments used in the manufacture of naval ordnance. Adjustable head. Length of the "points." Snap gage and point. Straightness of bore.



Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner