This restoration is on a 1903-patented Babcock tester made by the Creamery Package MFG. Co. of Chicago, USA. You can view the original patent here: https://patents.google.com/patent/US742815 This tool arrived completely seized, but with no known broken or missing parts, other than the original glass vials known as babcock bottles. Surprisingly, during the de-rusting process, the original blue paint showed up. Blue painted tools of this era are relatively rare and I was way too excited about it. I even had chunks of the original blue finish sent off for analysis with preliminary results suggesting the blue colour comes from natural cobalt. As per usual, I decided to sensually brassify most fasteners. Near the end of the video I explain how milk, sulfuric acid, and this machine work together to allow almost anyone to test the milk fat percentage from their cows. Spinning almost pure sulfuric acid at a high speed in fragile glass bottles very close to your face really makes you think about your life choices. Wrenches, screwdrivers, and socket drivers are now for sale at www.handtoolrescue.com Help secure more tools for future videos (if you want): https://www.patreon.com/handtoolrescue Instagram: https://www.instagram.com/handtoolrescue Facebook Group - Share your restorations https://www.facebook.com/groups/handtoolrescue https://www.facebook.com/handtoolrescue/ Reddit - Share your restorations https://www.reddit.com/r/HandToolRescue/ Podcast (with Jimmy DiResta and Andrew Alexander) - https://anchor.fm/fitzall