What is a dirty dozen watch?

A dirty dozen watch is one of a group of twelve specific timepieces supplied to the British Army by various Swiss manufacturers during the Second World War. These watches adhered to strict military specifications including black dials, Arabic numerals and stainless steel cases. Collectors prize them for their standardised military design and clear government broad arrow markings on the case back and dial.

How do I identify a trench watch?

A trench watch is identified by its transitional pocket-watch style case fitted with soldered wire loop lugs to accommodate a leather strap. They frequently feature porcelain enamel dials and sometimes include a removable metal grille or shrapnel guard over the glass. These pieces date predominantly from the First World War era and represent the earliest widespread adoption of wristwatches by military officers.

What do military issue markings mean?

Military issue markings indicate government ownership, department allocation and inventory serial numbers assigned upon military distribution. Common stamps include the British broad arrow, A.T.P. designations and specific RAF or Kriegsmarine codes. These engravings provide authentic historical context and help verify the active service lineage of the instrument.

Are vintage military watches waterproof?

Vintage military watches were originally built to withstand field conditions, moisture and dust, but gaskets and seals degrade over decades. Modern waterproof standards do not apply to historical pieces from the mid-twentieth century. It is wise to keep them away from water and humidity unless a professional watchmaker has recently serviced and tested the case seals.

How should I store a mechanical military watch?

A mechanical military watch should be stored in a dry, stable environment away from direct sunlight and strong magnetic fields. Winding and running the movement periodically helps keep the internal oils distributed correctly. Keeping them in a dedicated watch box protects the acrylic or glass crystals and the historic leather straps from unnecessary wear.