1930 Gilbert Bim-Bam Tambour Mantel Clock

This Gilbert tambour mantel clock does bim-bam strike on the hour and one single-note strike on the half-hour. The movement has “30” stamped on the back, identifying the year of manufacture as 1930.

The case is 20 3/4 inches wide and 9 1/2 inches tall. The dial is made of aluminum with embossed numerals. The minute track is 5 7/16 inches in diameter, with a 2 5/8 inch minute hand.

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Repair job  5710. Polished pivots, 15 bushings. The original time and strike mainsprings (0.0175 and 0.0181 inch thick respectively) were replaced with 3/4 x 0.016 by 120 inch mainsprings from Colonial Clock Co.

The front pivot hole of the second strike wheel was originally placed too high, causing wear to the very tips of the mainwheel teeth where they engaged the second pinion. I moved the hole down 0.4 mm when I installed its bushing.

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