This imposing barograph is Negretti & Zambra's Regency model and described in their 1950 trade catalogue as 'of the highest quality and workmanship and finish. Movement consisting of a specially formed set of diaphragms, fully compensated, operating lever mechanism to the pen-arm spindle. Jewelled pivots are provided to reduce friction to a minimum'. (See also extract from the M4 catalogue shown for sale at just over £29 - in today's money that equates to £1290).
Slightly larger than the standard barograph, this fully working example has a polished oak case, bevelled glass all round to the lift-off lid, a full width chart drawer to the base (mounted on brass ball feet) and is complete with the original glass ink bottle and brass dipper. The serial number engraved on the brass baseplate is R/6775 and with the logo of the NZ capitals combined would suggest a manufacture date of the early 1950s.
A selection of 6 months' supply of weekly charts included together a fresh bottle of ink and a reprint of Negretti & Zambra's 1950s pamphlet describing operating instructions and how to interpret typical chart recordings.A separate blank brass presentation plaque can be provided if required.
420mm wide x 235mm deep x 203mm high