Coin Operated Spring Testing Wrist Machine

| View Cart ⇗ | Info

This wrist machine features a handle spring fitted to test the wrist tension of any personnel. Machine indicates spring resistance, after a coin is inserted. This spring device has a body constructed to represent the figure of a man.

Source

Government Printing Office The Official Gazette of the United States Patent Office (Washington, DC: Government Printing Office, 1895)

Downloads

TIFF (full resolution)

1243×2400, 328.4 KiB

Large GIF

530×1024, 62.7 KiB

Medium GIF

331×640, 32.5 KiB

Small GIF

165×320, 11.7 KiB