There was no labeling on it. Looks to be real clean inside (as shown) oil clean too.
With a ASA reducer that is 5 1/2OD and 4 bolt hole stainless steel. With overall outside dimensions of (31H x 24W)and 30 1/2W over all. Thanks and have a blessed day. Please Note: This sale is for USA, ONLY! The item "High Vacuum Research Chamber 16ASA Diffusion Pump 480V Edwards Varian" is in sale since Sunday, February 14, 2016. This item is in the category "Business & Industrial\Hydraulics, Pneumatics & Pumps\Pumps & Pump Accessories\Vacuum Pumps\Other Vacuum Pumps". The seller is "labedge" and is located in Albuquerque, New Mexico. This item can be shipped to United States.