The article refers to it as a "Lampert PUK04" - a search turned up this link: https://www.lampertusa.com/products/puk04-with-microscope-sm04-and-argon-gas-regul

The article refers to it as a "Lampert PUK04" - a search turned up this link: https://www.lampertusa.com/products/puk04-with-microscope-sm04-and-argon-gas-regulator https://www.lampertusa.com/products/puk04-with-microscope-sm... I suspect that it has since been superseded by the current PUK6 model (and previously the PUK 5, judging by search results)