Unusual ‘Anti-magnetic’ 9ct Waltham Pocket Watch (1930)


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“A style of open-dial watch not often seen”

The white enamel dial is signed Waltham U.S.A and sports hand painted Arabic numerals and a sub seconds dial. Blued ‘flame’ hands complement the sturdy, tight fitting, 9ct gold case, hallmarked Birmingham, 1930.

48.17 mm in diameter (minus bow and stem) this is a full size watch.

The watch has been fully serviced with a 5 year warrantee, the case refinished and time-kept for a fortnight. In short, the movement is pristine and attains a high level of accuracy, the case is in superb condition, as is the dial, bow and winding crown.

A nickel inner case fits over this American Lever movement to shield the hairspring from magnetic interference. The magnet on your phone case or even on your fridge have the propensity to transfer a magnetic field to the sensitive hairspring of mechanical watches, causing attraction between each coil of the spiral. If one coil sticks to another the travel of balance wheel is affected, impacting accuracy dramatically. This problem plagued watchmakers in the industrial age and various strategies were devised to mitigate magnetisation – this watch is one of the more novel.

A practical heirloom-quality watch with many decades of use ahead.


The Waltham Watch Company, also known as the American Waltham Watch Co. and the American Watch Co., was founded by Aron Lufkin Dennison and produced about 40 million watches, clocks, speedometers, compasses, time fuses, and other precision instruments between 1850 and 1957.

In terms of watch case manufacture, A.F Dennison is also responsible for Dennison, Wigley & Company which, in 1905, was renamed the Dennison Watch Case Company, and continued to produce all kinds of precious metal and plated cases up until until 1967.


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