SPB185J1: Reinterpretation Seiko Hi-Beat Diver 300 m 1968
The Seiko SPB185J1, also known as the Hi-Beat Diver 300 m Reinterpretation from 1968. This model was used for the first ascent from Japan to Mount Everest and is inspired by the 300 m Seiko Diver from 1968, which had the highest hi-beat caliber of world standards.
Design
It has been modernized compared to the original version with a smaller case size: from 44 mm to 42 mm, and a high-visibility dial design. The case thickness is 12.5 mm, and it has a lug-to-lug size of 20 mm. In addition to the caliber change and resizing of the piece, there is also the added improvement of the nomenclature that Seiko adds to many of its watches (Prospex), which means (professional specifications). This translates to Robustness, Precision, Functionality, and Adventure.
Functions
Beyond its appearance, the Seiko SPB185J1 impresses with its automatic movement and the 6R35 caliber used with 24 jewels. With an estimated variation by the manufacturer of -15 +25 seconds per day. This mechanical precision is complemented by a day indicator and a manual winding capability, offering not only beauty but also exceptional functionality, and finally, its power reserve which is no less than 70 hours. Additionally, its unidirectional bezel completes this piece.
Details
The hands feature a sword model with a LumiBrite-coated tip, while the end of the second hand has two columns with one column filled with LumiBrite and the other column in red, which helps with visibility in dark conditions. Not only on the hands, but LumiBrite is also on the indices and the bezel. With a curved sapphire crystal resistant to scratches, along with its water resistance of 20 bar (200 m), it obtains the ISO 6425 certification thanks to this resistance. Finally, the stainless steel bracelet has a triple folding clasp with a safety lock and an extension button perfect for wearing over a diving suit.
Opinions on the Seiko SPB185J1 Watch
Seiko has built its reputation not only on the precision of its Japanese movements and technical specifications but also on expert opinions and feedback in various forums. These reviews underline the quality and performance of the SPB185J1, cementing it as a reliable and prestigious watch worldwide.
