It features the 4R34 automatic GMT caliber , which includes 24 jewels and a 41-hour power reserve.
By night, the watch transforms. The “24l” lumibrite is staggering. The applied indices glow a pure arctic white with a blue tinge, lasting easily through two full sleep cycles. Collectors joke that the SSK 001 Katty Angels In The 24l is the only watch you can read in a dark room after a week in a power outage. SSK 001 Katty Angels In The 24l
Inside the ticks the Seiko 4R34 automatic movement. However, Katty Angels specifications demand a higher standard. While standard 4R34s have an accuracy of +45/-35 seconds per day, the “In The 24l” variants are hand-regulated in a small workshop in Nagano to +10/-5 seconds per day. It features the 4R34 automatic GMT caliber ,
In March 2025, a pristine SSK 001 Katty Angels In The 24l (serial 24L00007) sold at Tokyo’s “GMT Auction” for ¥580,000 JPY (approx $3,900 USD). That is nearly 8x its original ¥72,000 JPY retail price. The applied indices glow a pure arctic white