The Topper Blog consists mainly of original writing by Rob & Russ Caplan with occasional special contributions and interviews. All photography in the blog is taken at Topper Fine Jewelers , or on location unless otherwise indicated in the photo captions.

Longines Heritage Military COSD

Two years ago, Longines came out with a series of three watches that captured the essence of military pieces in the 1930s with the Military 1938 collection. That series consisted of a full set of automatic movements (chronograph, GMT, and three hand) on sail cloth straps. This year's Military collection features a single style in two dial and strap variants called the Heritage Military COSD. This post will take a look at the this new series which takes design cues from a watch created for British Special Forces in the 1940s. The initials 'COSD' indicated the pieces were part of equipment intended for the sole use of the Combined Operations Command, a section created by the British War Office during the Second World War.

As it did in the base 1938 Military model, the Heritage Military COSD features the L619.2 calibre which is based on the ETA 2892/A2 movement. The 2892/A2 has a little more cache than the alternative calibres based on the ETA 2824-2 used in many of Longines other models. That 2892/A2 calibre has been the base foundation of the Omega 300M Seamaster in the 1990s and 2000s in the pre-coaxial 1120 calibre, as well as, the later 2500 co-axial escapement. While the 2892/A2 in the Longines doesn't have quite the power reserve or the accuracy of the C.O.S.C. grade version in the Omega, it's a prestigious calibre none the less. It also is not available in any of our other brands at this price point.

Comparing it to the 1938 Military, the Heritage Military COSD is sportier. The broad arrow gives the watch a distinctly British flare fitting with the theme of the watch. The dial includes a 24-hour military time scale and a period inspired minute track. The 40mm piece also features a high polish case and a relatively thick bezel. In fact, it may be the thickest non sport bezel I have seen on a Longines since I've been at Topper.

There are four ways to buy the Heritage Military COSD. At $1,700, there are two dial options (ivory and black) on green Nato straps. At $1,900, the same two dial versions are available on black alligator straps with high contrast white stitching and tang buckles. I'm partial to the ivory dial with blue hands. Below are additional photos of the Heritage Military COSD.

The Heritage Military COSD with an ivory dial on a black alligator strap.

The mirror high polish finish of the Heritage Military COSD.

The high polish case and horns of the Heritage Military COSD.

Another view of the dial of the Heritage Military COSD.

The Heritage Military COSD with an ivory dial and a black alligator strap.

The black dial version of the Heritage Military COSD on a black alligator strap.

The black dial version of the Heritage Military COSD on a black alligator strap.

A close look at the black dial version of the Heritage Military COSD.

The date indicator on the Heritage Military COSD.

Another look at the black dial version of the Heritage Military COSD on a black alligator strap.

The black dial version of the Heritage Military COSD.

The case back of the Heritage Military COSD.

The lume signature of the Heritage Military COSD.

The Heritage Military COSD with black dial on green NATO strap. Though the NATO strap can sustain water exposure without ruin, the watch is only water resistant to 3ATM and should not be submerged.

The Heritage Military COSD on a black dial with green NATO strap.

The Heritage Military COSD on a black dial with green NATO strap.

The Topper Blog consists mainly of original writing by Rob & Russ Caplan with occasional special contributions and interviews. All photography in the blog is taken at Topper Fine Jewelers , or on location unless otherwise indicated in the photo captions.