A Water Meter [1992×1478]
Source: https://openpics.aerobatic.io/
Select-O-Speed transmission of 1964 Ford 5000 tractor. [2741x2150]
Source: http://i.imgur.com/iFuOueX.jpg
HP 35 Calculator by Twylo on Flickr.
Use these 90% of the time.
MAN steam turbine (666X1024)
Source: http://i.imgur.com/zpdpNqs.jpg