The spring is of about 8 turns is open and attached by means of a rod threaded through a lug behind the centre of the plain, almost flat, crossbar. The chord is also threaded through a crest forming the upper part of this lug. The arched upper bow is narrow and longitudinally ribbed, with a slight moulding at the waist. The triangular foot has a border of punched dots. The upper surface is tinned or silvered. There is a stout plain catchplate and a slight rib above it which may be a casting flash.
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