Set of three Perkins tractors, possibly of steel,

Made:
1801-1850
Group shot, A602761 Electrogalvanic amulet, disc with zinc cross surrounded by six-petaled flower of zinc and copper,

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Group shot, A602761 Electrogalvanic amulet, disc with zinc cross surrounded by six-petaled flower of zinc and copper,
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group
© The Board of Trustees of the Science Museum

Set of three Perkins tractors, possibly of steel, brass and copper, in tube-shaped black leather case, first half 19th century. This set is probably an imitation, as it is not stamped with the Perkins name, and includes three tractors (two round and one flat) rather than two. Tractors bound together with a small removable ring. Identical to A658228 except this object's case is complete.