Screw Spanner, Prototype of a screwdriver with a maximum opening of six centimeters. Beak to both sides. D.m.v. a turning handle allows the key to be opened and closed (closing by turning clockwise). 1: 1 scale., D. van den Bosch, Hellevoetsluis, 1855, iron (metal), h 31.2 cm (closed) × w 9.2 cm × d 2.8 cm.
Screw Spanner, Prototype of a screwdriver with a maximum opening of six centimeters. Beak to both sides. D.m.v. a turning handle allows the key to be opened and closed (closing by turning clockwise). 1: 1 scale., D. van den Bosch, Hellevoetsluis, 1855, iron (metal), h 31.2 cm (closed) × w 9.2 cm × d 2.8 cm