Grana Watches


Grana 'Dirty Dozen' Watches at Auction

The 'Holy Grail' of all the Dirty Dozen watches, Grana WWW watches fetch the highest hammer prices of all twelve makers at auction. The brand with the lowest production numbers of all, this rare timepiece is often the one that eludes collectors and as such attracts an enduring interest at auction. Producing an estimated 1,000-5,000 timepieces of the total 150,000 Dirty Dozen watches, the Grana timepieces are powered by a cal KF 320 manual wind movement, housed within a 35mm stainless steel case.

The 'Dirty Dozen' watchmakers were Buren, Cyma, Eterna, Grana, Jaeger-LeCoultre, Lemania, Longines, IWC, Omega, Record, Timor, and Vertex. Tasked by the Ministry of Defence (MoD) to create timepieces for British troops in World War Two, the Dirty Dozen watches feature a W.W.W' (Watch. Wrist. Waterproof) inscription to case back, broad arrow to dial, black dial, arabic markers, luminous dots and hands within a chrome plated or stainless steel case. For a free and confidential valuation of your Grana 'Dirty Dozen' watch, contact our specialist.


Grana 'ATP' Watches at Auction

Further examples of Grana military timepieces include those with 'A.T.P' standing for 'Army Trade Pattern.' Frequently seen with a cream dial, with Arabic markers and subsidiary dial to 6, these timepieces from World War Two also attract interest at auction and continue to increase in value.  


Our specialist Fine Jewellery & Watch auctions are held four times a year and include the whole spectrum of watches, from fob watches, bracelet watches, chronograph watches, military watches and dress watches. Our department is headed by Liz Bailey who is FGA and DGA qualified, with many years experience in the industry. We offer a free watch valuations service both online and through in-house valuation appointments.

Contact our qualified specialist Liz Bailey to find out more.


< Back to Jewellery & Watches Directory

Liz Bailey


Department Specialist

+44 (0)1270 623878

Free Auction Valuation

We offer a free valuation service to anyone considering the sale of items through our auctions. Complete the form below and one of our specialists will get back to you promptly.

Fields marked * are required.


Images *

Drag and drop .jpg images here to upload, or click here to select images.

News & Articles


Jewellery News

Join our newsletter to stay up to date with auction news and articles.



Lot Alerts

Never miss out - sign up for our Lot Alerts and find the lots you're looking for.

Set up free alerts