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Carpenter’s Combination Tool

Prototype of combination carpenters level and square by John Graham (c. 1867). The tool combines several carpentry tools including a bevel, marker, gauge,try-square, and level. A Swiss-Army knife of woodworking measurement tools.

Reference Number:    RF.TOL.06

Date of Production:    C. 18th Century

Source Information:   National Museum of American History MC.210834.01



Ivory Ruler

Ivory ruler in seven folding sections. Shown along side octagonal green hinged case. Late 18th century

Reference Number:    RF.TOL.06

Date of Production:    C. 18th Century




Telescopic Level

Early prototype for telescopic level by John Clark.

Reference Number:    RF.TOL.04

Date of Production:    C. 1879




Paper Pens

Paper pens made by inmates at Pelican Bay State Prison. Because the plastic casing of the pen can be used to make potential weapons, the inmates are just given the inkwell. To make the inkwell useable, it is wrapped with paper to increase the diameter and string to secure the paper and provide grip.

Reference Number:    RF.TOL.07

Date of Production:    C.1990-2000

Source Information:   Mmusemm MC.210834.01





Naval Lantern

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Reference Number:    RF.TOL.07

Date of Production:    C.1990-2000

Source Information:   Mmusemm MC.210834.01



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