Fischer Instruments 1605B-45-B 6-5/8" Solid Brass Nautical Open Brass Face Barometer, USA Version This beautiful nautical instrument is made from the finest materials, and is at home with any marine decor. The open face barometer is equipped with a bayonet lock in the housing, so the barometric pressure can be easily calibrated. The back includes a hook for easy hanging. Operates to about 3,000 feet altitude (do not order if you live above 3,000 feet).