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On stand, with insulated base.
Aluminium, diameter 50 mm, in metal frame, with two hooks.
Brass, plated.
With effective scale lengths of nearly 9″, Rotary scales offer greater accuracy than linear scales. All balances are graduated in gram/Newton. Dial: 3″ diameter metal suspension ring at top and hook at bottom.
A fantastic model of centenary arch made of fine quality wood. It consist 13 precision-cut wooden blocks and a wooden arch. All pieces can be assembled to make a Catenary Arch
