Part No. 11 Prismatic Overarm, Part N. 66 Milling Arbor and part No. 45 Swivelling-base Vice. The overarm was fitted with a plain bronze bearing in the drop bracket to support a hardened and ground No. 30 INT arbor that was available in three diameters to accept 1-inch, 3/4-inch or 1/2-inch bore cutters. The two smaller sizes were provided with a sleeve on their end bearing surface to fit inside the drop-bracket bearing with the smallest 35mm shorter than the 145 mm overall length of the other two. With the assembly in place the maximum diameter of cutter that could be mounted was 150 mm (6-inches)

Part No. 12 Vertical Milling Head.  Swivelling 90-degrees from either side of central the No. 20 INT head had a stepless speed range from 60 to 2500 r.p.m. The maximum clearance between spindle nose and table was 325 mm, the minimum 12mm whilst the centre line of the spindle could be moved as far as 277 mm from the front face of the column, or brought as close as 127mm.

Part No. 13: Drilling Attachment for Vertical Head and Part No. 55 Swivelling and Tilting Machine Vice. Whilst the ordinary vertical feed was obtained by elevating the miller's knee this useful accessory allowed the operator to carry out sensitive drilling operations.

Part No. 15: High-speed Head. For precise jig and tool work when small cutters had to be precisely manipulated the ordinary vertical head was insufficiently versatile and too slow. To overcome this Christen, in common with most other manufacturers of the type, offered a head with its own self-contained motor drive that gave, in this case (from a 0.5 h.p. 3000 r.p.m flange-mounted motor) 8 speeds from 1200 to 6000 rpm. The head was able to be tilted 30-degrees either side of vertical,  accepted Schaublin W20 collets and was fitted with a 70 mm travel quill with both lever-operated quick-action and handwheel-driven fine feeds.

Part No. 16: Rack Milling Attachment. This 360-degree rotating unit was attached to the ordinary vertical head (No. 12) and carried a number 1 Morse taper fitting into which small cutter-holding arbors were held by a drawbar threaded M6. The stepless speed range ran from 30 to 1250 rpm.