Upper brake gauge at the front door near the driving cab of the preserved New Haven Railroad Budd Rail Diesel Car Number 32 at the <a href="https://en.wikipedia.org/wiki/Danbury_Railway_Museum" class="extiw" title="w:Danbury Railway Museum">Danbury Railway Museum</a>, in Danbury, Connecticut. The gauges were made by Westinghouse Air Brake Company, better known as WABCO. There's also an emergency brake cord next to that gauge.
<a href="//commons.wikimedia.org/wiki/User:DanTD" title="User:DanTD">DanTD</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>