image via WristWatchReview where you'll find a mini review. You can find the official product page here where the following description comes from. Stuhrling on Ebay
"The Centurion tank was designed during World War II by the British and has since proven to be the most successful and widely used tank of all time, equipping armies around the world. The Centurion tank design has stood the test of time by any standards, and now Stührling Original presents a new timepiece for all time… the Centurion!
Looking like a tank in its massive 38x44 millimeter case, this Centurion is built like a tank as well. The well-conceived wrist adornment is constructed of only the finest of steel, solid 316L surgical grade stainless steel. The impressive three-piece tank-shaped case with its vertically striped side motif brings to mind the six-wheel design of its famous namesake. Conjuring the imagery of tank-wheels rolling inside of a treadmill-like band is the unique ridged rubber belt wrapped tightly around the steel crown.
On its face, the Centurion is as attractive to look at as it is rugged and masculine to wear. The skeletonized 20-jewel self-winding engine that drives this timepiece not only delivers a precision three-hand mechanical movement, but also doubles as its own dial! With hand-engraved scrollwork on what remains of the front-plates as a backdrop, the individually applied high-tech Arabic numerals appear to be floating as there is no visible dial to hold the distinctive markers! The fancy-shaped angled flange sports luminous one-fifth minute markers while the hour and minute hands are cleverly conceived bullet-styled. The luminous (or color-coordinated) tipped center sweep second-hand sports the signature Stührling “S” on its tail for an added touch of detail.
The Centurion’s ever-so slightly curved case hosts a Krysterna™ crystal on its topside with a curvature to match. The seamless integration of the prodigious 35-millimeter wide heavy silicon rubber strap with the colossal Centurion case is visually impacting with the signature Stührling “S” screws holding it all together! The robust solid steel tang buckle is a perfect complement for the large rubber strap.
The underbelly of this tank is impressive as well. With six screws total to secure the custom silicon strap alone and another four screws holding the case together, the bottom view of the Centurion confirms the tank-like build! Through the Krysterna™ crystal in the stainless steel case-back, there beating at 21,600 vibrations per hour in all its glory is the steadfast Stührling caliber ST-90089 movement. Featuring blued steel screws and a skeletonized and hand-engraved rotor, this tank is just as attractive under the hood as it is from afar.
This tank functions on land and water as the Centurion is water resistant to 50 meters. So, the next time you go out of the house, take a tank with you….the Centurion from Stührling Original!"