OMEGA 40's / Dirty Dozen / Cal.30T2

Introducing Omega's "Dirty Dozen" from the 1940s .

Known as the "Dirty Dozen", these were produced for the British Army during World War II.
This is a military watch series supplied by 12 Swiss brands based on the strict military watch specifications set by the British Ministry of Defence, and Omega is one of the manufacturers that boasts high technology and reliability.

The "Dirty Dozen" was delivered as an official model to the British Army.
This model features a black dial designed with visibility as the top priority, with luminous Arabic numerals and thick hour and minute hands.

The white railway track around the outer edge of the dial and the small second hand at 6 o'clock enhance the rugged beauty of a military watch.

The Broad Arrow mark, indicating that the watch was issued by the British government, is proudly placed in the center of the dial, a detail that evokes the weight of history.

The case has a simple round shape, and the streamlined design and powerful form create an atmosphere of ruggedness yet elegance.
It goes well with NATO -type nylon belts and can be used in a wide range of situations, from casual to military style.

This is a truly historic piece that combines history, practicality, and design.

The movement is a 15 jewel hand-wound Cal.30T2 .

It received extremely high praise as a military watch was required to be practical, and is one of the famous calibers that had a major influence on Omega's later movement development.

Size: height: 45.3mm , width: 37.8mm , thickness: 9.7mm , weight: 47g .

The slightly larger case size gives it an impressive presence when worn.

It goes well with military style and work fashion, as well as simple white shirts and plain T- shirts.

The condition of the case is excellent with no major scratches or noticeable damage overall.
The dial is in excellent condition with excellent visibility and no stains or damage.
The movement is running smoothly and there are no issues.

*Since the lugs are welded, only pull-through belts such as nylon belts can be replaced.

All watches sold in our store are internally inspected by a professional watch mechanic upon arrival and are only sold after being determined to be genuine, so you can use them with confidence.


When you purchase a watch, we will attach a new leather strap to it when you deliver it to you.
Please select the color you want from the order selection tab and place your order.
*For products that come with original watch straps or metal bands, the leather strap will not be attached and will be sent separately as a spare.
A special case for the watch will also be included with the shipment.

Please be sure to read the following information after purchasing an antique watch.

When selling antique watches at RESUME, we do not immediately hand them over to you when you place your order. Instead, we ask a professional craftsman to overhaul them (hereafter referred to as OH) and deliver them to you after the OH is completed. (This takes about 1 to 2 months.)

A professional craftsman with first-class watch repair technician qualifications will completely disassemble your watch, replace worn parts such as the internal gaskets, clean it, oil it, and perform a thorough overhaul, maintaining it to a daily accuracy of about ±1 minute.
When we deliver the machine, we will also send you our own overhaul certificate, which shows what kind of overhaul was performed, as well as photos of the machine being disassembled and maintained.

Of course, due to the nature of the product itself being a second-hand item, there is no guarantee that it will never break, but we ask for your understanding that we take this approach so that you can enjoy the original performance of the watch and use it with peace of mind in the future.

When you purchase a product, we offer a one-year warranty depending on the model. Even if the warranty period has expired, we will still repair the product for a fee. If there is no repair shop near you, please feel free to contact us.