You are looking at a Amp portable hydraulic pump. They have never been used and dont think they have ever been filled with oil. Theres a handy carry handle on the top and an outlet with a screw cover.
Theres a 4 pin aux outlet which I can imagine is for a control device to be fitted for pumping forward and reverse. There is a Parker directional control pilot valve on it rated at 4000psi (model DIVW20B4VE). Dont know much about these so hope they are of use to someone. The item "Amp / Parker hydraulic pump 110v Portable Power Pack New Old Stock 2 Of 2" is in sale since Saturday, April 17, 2021. This item is in the category "Business, Office & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Other Hydraulics & Pneumatics".The seller is "weekenny" and is located in Dalry . This item can be shipped to United Kingdom, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, United States, Bahrain, Canada, Japan, New Zealand, China, Israel, Hong Kong, Norway, Indonesia, Malaysia, Mexico, Singapore, South Korea, Switzerland, Taiwan, Thailand, Bangladesh, Bermuda, Bolivia, Barbados, Brunei darussalam, Cayman islands, Egypt, Guernsey, Gibraltar, Guadeloupe, French guiana, Iceland, Jersey, Jordan, Cambodia, Liechtenstein, Sri lanka, Macao, Monaco, Maldives, Martinique, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Saudi arabia, South africa, United arab emirates, Ukraine, Chile, Bahamas, Colombia, Costa rica, Guatemala, Honduras, Jamaica, Kuwait, Panama, Qatar, Trinidad and tobago, Uruguay, Philippines.