This is an 18k yellow gold Blancpain Villeret Ultra Slim Power Reserve 1106-1418-55. It has a black leather strap with the original 18k Blancpain tang buckle, and a scratch resistant anti-reflective sapphire crystal. The solid 18K yellow gold case back is engraved with "Blancpain," and the edition number 356. The 36mm diameter solid three-body case, straight "dove's head" lugs, and stepped bezel are polished. The black dial features polished sword hands with luminous inserts, applied faceted dart and luminous dot indices, and applied fancy Arabic numerals at 9 and 12 o'clock. There is a perimeter minute scale, and a date aperture window is at the 3 o'clock position. A white subsidiary dial with running seconds is at 6 o'clock, and there is a 100-hour power reserve indicator at 4 o'clock. It's water resistant to 30 meters/100 feet, and the 8.5mm thick case, dial, and movement are all signed. This Blancpain Villeret Ultra Slim Power Reserve 1106-1418-55 has a mechanical manual winding Blancpain caliber 1106 movement. It's rhodium-plated, with "fausses côtes" embellishment. It's constructed with 23 jewels, 148 components, a shock absorber device, and twin mainspring barrels run in series. It includes a straight-line lever escapement, and a monometallic balance that's adjusted to 5 positions. There is a self-compensating flat balance-spring, and a gold rotor. The mechanism oscillates at a frequency of 21,600 vph (3Hz).