Mahogany Barograph with Mirror Back

This is a nice 1950s barograph finished in a red mahogany case with a deeper and more substantial base profile than average and therefore slightly larger overall. It also has the benefit of a mirror back which reflects the brass movement and clock drum enabling the observer to see chart readings from earlier in the week. A quantity of charts is included together with a fresh bottle of special blue or red recording ink and a reprinted pamphlet by Negretti & Zambra describing operating instructions and how to interpret typical chart recordings.