Looking for a used one in nice shape. Albrecht sells these as C65/0JT, or just 65/0JT. I'd consider metric, which would be marked something like 0-6mm. For a High Speed Hammer R-53 Precision ("Sensitive") Drill Press. If you have a suitable chuck that has an arbor in place, please price the chuck only, minus the arbor.
-Marty-