10401850
Joseph Sloper, English inventor, 1873.
10401850
Joseph Sloper, English inventor, 1873.
10656798
Illustration shows a Hand Roll Perforator, a Treadle Paging Machine, A Hand Lever Paging Machine, A Hand Lever Perforating Machine, A Treadle Perforating Machine and a Hand Lever Paging Machine
10656798
Illustration shows a Hand Roll Perforator, a Treadle Paging Machine, A Hand Lever Paging Machine, A Hand Lever Perforating Machine, A Treadle Perforating Machine and a Hand Lever Paging Machine