I don't know the exact model number because it's old. I think it's discontinued. There's a number that looks like 3028B. Photos 3, 4, and 11 are images of the monitor magnified with a microscope. I don't know the market price, so please purchase if you know the market price. Search terms: Hi-uni 5050 3051FF First generation graph pencil Graph II TK-matic TK-matic vario L α-matic α-matic titanium automatic automatic H5005 Technomatic Technopress Variable First generation mechanica Micrograph automac E500 automac E pg15 pwp15 Bonan Pen Nohara Kougei