This is a Harbor Freight (Pittsburgh) Digital Indicator, Model #63613. I modified one of the models I found on this website. It is measured from an existing indicator I bought at Harbor Freight, so it is fairly accurate. I did not make it as an assembly, but it is shown all the way extended. Hope someone else can use it, and save some time making one.

I made this quick to show the physical size and mounting holes for this air blower (scroll cage fan). I have a Model #4C004A, but the Model #4C004 and #1TDP1 seem to be the same. Purchased from Grainger, but they could not supply me with a CAD model.......so I made my own. I drew it in Solidworks 2018, but I was unable to save to an earlier version as an sldprt or stl file. Contact me and I will send you whatever file you want.