Vintage work crew photos

[Toolmaker51]

They're the balance we used in the lab decades ago before digital. Remarkably sensitive. We used tweezers to set the weights because our hand oils would change them, adding weight initially and corroding them eventually.

My Lyman calibration/ verification weights for reloading are handled identically. Often wonder why more corrosion resistant metals aren't are not used; brass turns out just 'Ok'. And lol, half of them too stinkin' small for anything but tweezers!