Altimeter, Sensitive, PZL PB-1 See a photo of the

See a photo of the panel from the F4U Flight Manual

The Henry Paulson firm appears to have been engaged in the manufacturing and/or marketing of precision instrument tools and equipment

The thumbscrew on the end of the device loosens

The aircraft had a separate gyro horizon and vertical velocity indicator for routine flight monitoring

Altimeter, Sensitive, PZL PB-1 See a photo of theThis is a Sensitive Altimeter labeled for use in aircraft of Poland's PZL Pastwowe Zakady Lotnicze (State Aviation Works). PZL is embossed on the dial of the instrument, although not readily visible in the photos. Not much is known about this altimeter, other than what might be surmised from its service label from Palma S. A. Geneva dated 1962. The bottom right mount has been modified removed for an unknown reason.