The Orient Stretto Sun & Moon RA-AK0313Y30B is a mechanical wristwatch featuring a brown sunburst dial with a sun-and-moon indicator and a day-of-the-week sub-dial. It is powered by the in-house automatic Calibre F6B24 movement, offering both automatic and manual winding capabilities, along with hacking seconds. The watch has a stainless steel case measuring 41.5mm in diameter and 13mm in thickness, complemented by a stainless steel bracelet. A flat sapphire crystal protects the dial, and the exhibition case back allows for viewing the movement. Additional features include a date window at 3 o'clock, luminous hands and indices, and a water resistance of 50 meters. The reference number for this model is RA-AK0313Y30B.