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Brass pantograph in original wooden case
Lot 315
Collection of slide rules and other items to include Unique Universal 2 slide rule, Unique Universal
Collection of slide rules and other items to include Unique Universal 2 slide rule, Unique Universal slide rule, Unique Brighton slide rule, a A W...
Lot 326
Crosby Steam Gauge and Valve Co of Boston, Massachusetts, hardwood cased steam engine indicator
Crosby Steam Gauge and Valve Co of Boston, Massachusetts, hardwood cased steam engine indicator complete with original wooden rules and various re...
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