u/Responsible-Cold4121

I pulled the chuck of my new to me 13x33 Mori engine lathe for some much needed tlc. This looks like a D1-6 chuck (camlock) but I believe they originally came with an A1-6? I would like to purchase a 4 jaw chuck and would like to make sure I order the correct mounting type. Any info on the manufacturer of the 3 jaw would also be great. Thanks.