Altimeter, Sensitive, PZL PB-1 The Henry Paulson firm appears

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

Here is a collection of authentic WWII-era Recognition Posters of aircraft of the British RAF as published by the US Naval Aviation Training Division during the war

The thumbscrew on the end of the device loosens

and A-29 Hudson bomber

part number 2550

Altimeter, Sensitive, PZL PB-1 The Henry Paulson firm appearsThis 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.