![](http://www.alamy.com/thumbs/6/B58388A0-FEDD-45DD-B219-1E9842B1B4BD/2GGBN23.jpg)
Vacuum operated, ball bank indicator, 6 1/2 in. h.,
Size: 4752px × 3654px
Photo credit: © Heritage Images / Alamy / Afripics
License: Licensed
Model Released: No
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