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  • Thumbnail for File:Century JJ Intermittent.JPG
    The dual-gauge intermittent sprocket on a Century JJ, attached to the intermittent mechanism. ...
    (3,568 × 2,440 (3.67 MB)) - 18:21, 27 May 2020

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  • ...red to as the holdback sprocket). Soundheads with a Davis tight loop (ex., Century) typically employ a single holdback sprocket because the film is stabilized ...nt.JPG|right|thumb|400px|The dual-gauge intermittent sprocket on a Century JJ, attached to the intermittent mechanism.]] ...
    12 KB (1,931 words) - 18:26, 29 May 2020