This is a very unusual working instrument by JP Friez of Maryland recording both barometric pressure as well as temperature & set out each side of the recording drum. Fully restored in a vibrant green & black metal case with glass viewing panel to the front & carry handle engraved with Julian P Friez & Sons. Internally, there is a label stating the makers name & ‘Belfort Observatory, Circa 1935. Baltimore USA’ 175mmH x 347mmW x 150mmD (Overall width including the external temperature sensor is 450mm).



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