Historical information
http://www.archivingindustry.com/Indicator/chapterfour.pdf
Physical description
Steel steam engine indicator with accessories as shown ; velvet lined timber storage case 255mm x 220mm with brass hinges and latches.
Additional information can be found online via: http://www.archivingindustry.com/Indicator/chapterfour.pdf
Refer p. 4-23 [last viewed 20 May 2013]
Inscriptions & markings
[a] John S Bushnell & Co, New York Pat.Feb.20.1894 [b] New York Pat.Jan.19.1892 1257