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Brass, with ring on top
Aluminium, diameter 50 mm, in metal frame, with two hooks.
Aluminium tubular balance, with zero adjustment. Scales are both in grams and Newton. With upper & lower suspension hooks, graduation on inner tube.
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
