For info:
SERIAL #: 3A-456-1 MODEL: 3A Date of Manufacturer: 1961 Arm Length 4" Column Diameter 13" Main Motor 15 HP Spindle Speeds 15-1500 RPM Spindle Feeds .004 to .041 IPR Threading 8, 11.5, 14, 18 TPI Equipped with: Universal Box Table Standard Base Power Head Traverse Power Elevation Power Clamping and Unclamping