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Published on Mar 2, 2014
Since I had the dial off to photograph this clock for http://wkinsler.com/clocks/ I thought I'd make a film demonstrating it in action. This clock is known for having only 2 gear trains to perform what is usually done with three gear trains in most clocks. This clock was made in the 1920's, a time it seems that every American clock company introduced a chime clock. Most companies developed movements with 3 gear trains which means 3 mainsprings to wind, one for each train. Sessions chose a different approach, and designed the 2 train Westminster movement with only 2 mainsprings to wind based off their already existing time & strike clocks. In fact, the dial off of a time & strike mantle clock will match right up to the arbors on this movement. Sessions also adapted this movement for electric clocks, and made a bim-bam quarters chime & hour strike clock variant as well. Its worthy to note that Seth Thomas also made a bim-bam quarters chime & strike clock variant of their popular 89 series movement as well.
Also demonstrated here, though not intentionally, is the clock's ability to auto correct the chime, a feat many of Session's competitors could not do.