Champion 14-inch lathe with quick-change screwcutting gearbox.
Although of very similar appearance, compared with the 12-inch lathe the swing over the saddle was 15/8" greater, the saddle 21/4" longer and the bed nearly 15% wider and 16% deeper. With is standard 6 foot long bed it admitted 38" between centres and beds could be ordered in two foot increments up to any length desired.
The saddle was fitted with two transverse T slots, enabling it to be used as a simple boring table, or able to hold additional toolholders for special jobs.

An option on the 16-inch lathe was a Double-ratio Back Gear of 10.5 : 1 and 3.3 : 1 - either of which could be selected without stopping the lathe, or the operator having to move away from his normal working position at the front of the machine.

16-inch Champion Lathe with the optional Double-ratio Backgear - the engagement bar can be seen above the headstock cone pulley. The device was intended to make the lathe capable of very heavy-duty turning and enabled it to turn at exceptionally low speeds. To help cope with the increased torque requirements the makers reduced the number of cone pulleys to three, and increased their width to accept a 4-inch wide  belt in place of the 3 inch used on the ordinary version..

The largest lathe in the Champion range of the early part of the twentieth century was this 18" model with a swing over the bed of a little more than 19 inches and, in standard form, admitting 30" between centres - though beds in two foot increments could be ordered up to any length the customer though prudent.
For a large lathe the 15/8" hole through the spindle would be though inadequate today, but at the time was very much an average figure for a "commercial quality" engine lathe. The front spindle bearing was 27/8" in diameter and 43/4" long - the back bearing 27/16" in diameter and 33/4" long..