The Seiko Seiko-5 Seiko SSK001 is a stylish and functional timepiece that is inspired by one of Seiko's best-loved sports watches, known to enthusiasts as the Seiko SKX series. This watch is an automatic GMT with manual winding capability, featuring a frequency of 21,600 vibrations per hour and a power reserve of approximately 41 hours. It has 24 jewels that reduce friction and wear, contributing to its longevity.

The watch features a black and gray 24-hour GMT bezel that makes it easy to track the time in a second time zone. The black dial is simple and elegant, with luminous hands and markers that make it easy to read in low-light conditions. The large GMT hand also helps with visibility and legibility, ensuring that the wearer can keep track of time in multiple time zones.

The magnified date calendar is a convenient feature that adds to the watch's functionality. The screwdown see-through caseback is also an excellent feature that allows the wearer to see the movement inside the watch. The case diameter is 42.5mm, and it is made of stainless steel, which adds to the durability of the watch. The stylized five-row bracelet and tri-fold push button release clasp with lock make the watch comfortable and secure on the wrist.

The Seiko Seiko-5 Seiko SSK001 is water-resistant to 10 bar, 100 meters (330 feet), making it suitable for swimming and snorkeling, but not for diving. It is a reliable and accurate timepiece that is powered by Caliber 4R36, a movement made by Seiko.

In summary, the Seiko Seiko-5 Seiko SSK001 is a sleek and stylish watch that is perfect for those who want a reliable and accurate timepiece that is also functional. It features a unique design, reliable movement, and notable features that make it a great choice for watch enthusiasts.