Worn & Wound
Grand Seiko Unveils the Tentagraph, a New Sports Chronograph with a Three Day Power Reserve and High Frequency Movement
This year’s marquee release from Grand Seiko is the all new Tentagraph, an imposing and technically impressive chronograph that makes use of a new high beat caliber and a case shape derived from previous watches in the Evolution 9 Collection. It’s kind of hard to believe, but up until now, Grand Seiko didn’t have a purely mechanical chronograph in their collection. Spring Drive has ruled the day if you need a watch for timing laps, steaks, or anything else, but that changes this year. With the Tentagraph, which carries reference SLGC001, Grand Seiko introduces a new movement, Caliber 9SC5. This movement is notable for its shared architecture and essential technical features with the next-gen 9SA5, the double-impulse escapement caliber introduced by the brand a few years ago. We’ve seen that basic time and date caliber adopted in a variety of excellent watches in the relatively short time it’s been in production, but this is where the fun really starts: we now have a new caliber derived from the 9SA5, which of course would lead anyone following the brand to think that a) we’ll see more chronographs coming from Grand Seiko within the Evolution 9 Collection and b) we’re likely to see more complications. The 9SA5 now takes its place as a halo caliber, with many possibilities ahead when it comes to variations large and small. Like the 9SA5, the 9SC5 beats ten times per second and is powered by two barrels giving it a three day power reserve. That’s with the ...
