Yes, its an 851 but I am a little confused by your last picture. It appears that the internal framework is not there? If so, there is nowhere to mount the original clock and the clock mechanism would have to be mocked up onto the face plates. The light manifold would also be non existent. Am I correct? The picture looks to be taken from the bottom.
How is the visiguage attached? Does the top just slip off and the sheet metal lift off?
Looks like you just have some 851 parts that are kind of laying on top of each other?

Edited by K W FRITH (Tue Oct 10 2017 12:44 PM)
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Specializing in old Gas Pumps