Small belt driven brass gear pump. Only markings are the California on the end plate. Gears rotate when the pulley is turned. My dad polished, painted and had this on a static display probably since the late 1980′s. No idea what it came off of or if it originally had a gear to drive it. Overall length is just over 6. Mounting holes right at 2 1/4 on center. Water inlet main body thread holes are roughly 3/8. Outlet holes on end plate are smaller about 5/16. Not versed on how to correctly calculate pipe thread dimensions. From my dad’s collection and has been stored for in excess of 20 years possibly as many as 35. He probably hand polished brass it many years ago. I have a huge number of old gas engine items that I hope to be able to list this year. Bigger items are located in Fallon, Nevada. Please refer to images. Message any questions or for more images.