Much more heavily built the 13-inch version carried its motor inside the cabinet, had a distinctive, flat-topped headstock and a combined clutch/brake control protruding near the lathe bed at the bottom right-hand corner of the screwcutting gearbox. In this application, instead of being fastened to the stand, the Hydraulic pump and tank are shown as separate units.       

An 11-inch swing Harrison fitted with a separate Hydraulic Pump and Tank at the tailstock end of the bed - the long rectangular tank fastened to the back of the lathe was for coolant.  The 11-Inch lathes had their motors mounted externally; the 12-inch and 13-inch versions carried theirs inside the stand on a hinged plate.

An 11" inch swing L5A Hydraulic Copying lathe fitted with its distinctive "chuck" guard. The layout of the switches on the electrical control panel indicate that this particular machine was fitted with a two-speed motor.

A flat template holder, complete with micrometer

Travelling Steady.
Like other Harrison lathes the top slide could be rotated 360 degrees on the cross slide, which was of the "short" type, with protective tin covers over the front and rear potions of the cross-feed screw; however, instead of the expected superior-type of tapered gip strip on the cross slide, an ordinary flat inset was used, adjusted by pusher screws.