Some early examples from my collection.

A Wheeler & Wilson design from about 1875. It has a glass presser foot and a rotating hook with a flat round shuttle to form a lock stitch.	An Original Express from Germany. This is a simple design which uses a rotating hook, invented by James Gibbs in 1857 to produce a twisted chain stitch. This machine is from about 1880.	An Atlas design from Brunswick, Germany. It is a lockstitch with the boat shuttle swinging in a horizontal arc. A shaft running under the base carries a rotating cylinder with grooves which move cams to work the four motion feed and the shuttle. This one is from about 1880.
An early Naumann from Germany. It is a lockstitch with a cam and groove for the needle bar movement.	A Singer 12K fiddlebase. Many of these are still used by artist quilt-makers Millions were sold and kept in working condition. It is a lockstitch with a transverse boat shuttle. This one was made in 1878.	A neat Eagle design incorporating a lockstitch with the shuttle in a horizontal, curved race.
A Wilcox and Gibbs machine. This was the first to use the rotating hook to produce a twisted chain stitch (James Gibbs 1857). It needs only a simple rotary movement and so has been used by many other manufacturers. They were still being produced in the1940's.	A Jones Fiddlebase. It is a lockstitch with a boat shuttle in a carriage which slides along a bar under the circular workplate on which is inscribed "As Supplies to H R H Princess of Wales". They were produced well into the 1900's.	The Louise. A French lockstitch machne with a curved shuttle race moved by a cam on the lower axle. "The Louise" can just be made out on the head and the words Wilcox & Noble, Wilcox & Carlton and Gibbs can just be seen on the shuttle plate. From about 1880.
Silent A. I can just make out the words "Silent A" and "Swift and Sure" on the bed. The make is unreadable. Patents for 1872 and 1876 are engraved on the bobbin winder. If you know what it is please let me know.	Wilcox & Gibbs on a treadle. The W&G treadle is a work of art. It is very ornate with an attractive bronze finish.