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Hamilton 4992B civilian conversion.

Hamilton 4992B civilian conversion.

A Hamilton 4992B military pocket watch that has been converted, and re-cased for civilian use.

The superb 4992B was created by Hamilton to fulfill government contracts for a highly accurate watch that could be used for navigational purposes, and also as a master timepiece that all timepieces within a unit could be synchronised to. Taking the highly accurate and reliable 992B and converting it to run a centre seconds hand the 4992B was born.

The movement has 22 jewels, a fully capped Swiss lever escapement with double roller, gold timing screws, the "Elinvar" white metal hairspring and solid mono-metal balance wheel, and a sprung micro-regulator. The watch is stem wind and stem set, and has a "hacking" feature whereby pulling the crown to time set position operates a rocking bar type leaf spring that engages with the balance wheel and stops the watch. Press the crown back to winding or run position and this spring disengages from the balance and the watch instantly restarts. This feature allows for time setting to the precise second and obvious easy synchronisation with other timepieces.

This watch has recently been serviced and runs strong and reliably whilst keeping excellent time, the hacking feature works as described. This watch has been converted to run a 12 hour sweep of the hour hand whereas the standard 4992B runs a 24 hour sweep.

The gold filled case is in very nice condition although the raised centre second bridge on the movement does prevent the rear cover from fully screwing down. It is however secure and tight.

The 12 hour off white painted dial is in good order but does have some age related staining to the edges which is impossible to remove without damaging the finish.

A good set of enamelled steel hands under a good acrylic crystal.

Overall an unusual conversion of this highly sought after watch in excellent every day useable condition.

  • Shipping and delivery.

    Delivery to all UK postcodes fully insured next day delivery.  £10

    International shipping fully insured with UPS only.
    USA £40.  Europe £25.  Other destinations please enquire.

    International buyers are solely responsible for any import charges incurred.

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