Cincinnati Independent Overhead Spindle with a double-swivel head - replaces the
Standard overarm on horizontal models to convert it into a vertical miller.
Identification: a rectangular appearance with a single dial on the right-hand face of the head. Parts Manual as Sectional Drawings.

Cincinnati Independent Overhead Spindle with gear drive - replaces the
Standard overarm on horizontal models to convert it into a vertical miller.
Identification CAA-LR: this is the model with lever speed-change levers on the side
face. Parts List as Exploded Component Drawings.