Antique Machinist's Leather Covered Notebook Filled with Blue Prints four lens tintype 5 3/4" long x 1

5 3/4" long x 1 1/16" wide x 5/16" thick

works perfectly

with some color testing at bottom left corner which I think is all to the good

waiting to emerge

Antique Machinist's Leather Covered Notebook Filled with Blue Prints four lens tintype 5 3/4" long x 1I just can't resist things like this, which were central to the lives and work of the people who once owned them, this one seeming a bible of sorts for a George F. Ingham, who I presume was a machinist of some kind. Plus I just find the blue of these blueprints so gorgeous, and all the better for all of the very precise columns and grids of measurements and calculations packed onto them. Covering a spectrum of types of rivets, wire, screws, bolts,