Final note on my article regarding the persistent Black Forest clock
In the heart of Canada, a Blackforest shelf clock, a commemorative edition piece from 1937, has been brought back to life after years of silence. This Delft Plate Clock, a product from the Blackforest Clock Company based in Toronto, Ontario, has been the subject of intrigue for its unusual behaviour and the author's persistent efforts to restore it.
The Blackforest shelf clock, known for its simplicity and accuracy, typically runs for 4-5 days instead of the full eight days. This shorter runtime is a characteristic of many vintage or simpler plate movements, a result of their original mechanical design with smaller mainsprings or weights and simpler gearing. Other factors contributing to this include the movement's design, mainspring strength and size, weight configuration, age, and condition.
Upon receiving the clock, the author found it in need of exercise, having not run for many years. After some initial testing, mixed results were observed, leading the author to suspect a mainspring issue causing the shortened cycle. To address this, a bushing was installed on T3, which led to an improvement in the clock's performance.
However, despite the improved performance, the clock still only lasts 4-5 days per winding cycle, falling short of the desired 8-day duration. The current clock is midway through its second 8-day cycle, running strong and sounding better than ever.
The Blackforest shelf clock's movement is so-called because it was typically used on kitchen clocks with Dutch Delft plates. Known for their stubborn nature and difficulty in service, these movements have a reputation that precedes them. Yet, the author finds these clocks fascinating and prefers working on them.
As the Blackforest shelf clock's story reaches its happy ending, another clock from the same company, Forestville, is expected to arrive. The author looks forward to the new challenge, hoping to uncover more mysteries and restore another piece of clockmaking history.
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