Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm
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LOT NO 3122

STOCK NO 98773

Early 20th century Automatic Temperature Control System, the polished copper body supporting a tube of liquid mercury, patent no 5311 dated 1912, attributed to John Grundy, within wooden box with glazed front panel, box H18.5cm

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