The Complex World of Casebacks

Casebacks are essentially the hood of the car, providing access to the engine (a.k.a. the movement) for maintenance and repairs, but otherwise remain closed. It’s common today to display the movement under glass or sapphire, not unlike how exotic mid-engine sports cars display their high-horsepower engines under glass panels. And some casebacks are dynamic, adapting themselves to underwater pressures. If we go back to the beginning, however, things were very different. Nuremberg Eggs from the early 16 th century were the first pocket watches (although small portable clocks in reality) and introduced casebacks as hinged lids without effective water or dust resistance, but a closed lid is better than nothing. These were typically made of brass and provided access to wind and set the movement, and also to service the gear train, verge escapement and other components. However, some parts needed access from the front cover as well, and there wasn’t a fixed crystal in the way (just a single hour hand under a cover at the time).