Tony Mercer, Mercer Chronometers, Mayfield, 2003, p.85, figs. & 3/53
The concept of being able to demonstrate a chronometer escapement, the movement and the dials all packaged in a revolving crystal cylinder was ingenious and aesthetically very pleasing. Today, thanks in part to the modern complicated wristwatch market, there is renewed interest in escapements and escapement models. However in the early 1980s there was sadly very little interest in this clever timepiece and Mercers made only six examples of these extraordinary clocks.