2025 Otsuka Lotec No. 7.5 Jumping Hour 40mm

Here we have a quirky 2025 Otsuka Lotec No. 7.5 Jumping Hour featuring a 40mm round stainless steel case that comfortably sits on your wrist with elegant wire lugs. Its soft, rounded, circular brushed flanks lead to a lug-to-lug length of 44.5mm and a case thickness of 14mm, giving the watch an impressive wrist presence. On the right side, at 4 o’clock, a hobnail knurled crown. The flat sandblasted top surface of the case houses the three domed apertures inspired by the old 8mm turret cameras. A circular brushed jumping hour sits next to the concentric circular minutes above the circular brushed running seconds. The engraved Otsuka Lotec motif completes this distinctive jump hour. On the reverse, a screw-down exhibition case back engraved with the watch details around its edge, inside an automatic Miyota Cal. 82S5, 21 jewels, beating at 21,600 beats per hour, featuring a unidirectional skeletonised rotor. The module is created by the skilled watchmakers at Precision Watch Tokyo, a company run by Hajime Asaoka, who also manages Kurono Tokyo and Takano. The entire process is overseen by Jiro Katayama. It comes paired with its 20mm calf-skin leather strap and pin buckle. This watch is sold with its original Otsuka Lotec box and paperwork.

This watch is sold with its original Otsuka Lotec box and paperwork. It comes paired with its 20mm calf leather strap and a pin buckle. The watch is from February 2025 and is sold in worn condition, but overall it is in very fair condition, as you can see. The watch comes with our 12-Months Warranty.

It is fantastic to see such a unique style garner so much interest from collectors. This Otsuka Lotec No. 7.5 Jumping Hour combines the jumping hour mechanism with a steampunk and camera lens inspiration to create something truly unique and interesting, whilst still wearing great on the wrist at 40mm. The module is created by the skilled watchmakers at Precision Watch Tokyo, a company run by Hajime Asaoka, who also manages Kurono Tokyo and Takano, and the entire process is overseen by Jiro Katayama. I would not hesitate to add one of these to your collection when the opportunity arises!

Reference : No. 7.5
Movement : Automatic Miyota Cal. 82S5
Age : February 2025
Year : 2025
Case Size : 40mm
Case Thickness : 14mm
Lug to Lug : 44.5mm
Lugs : 20mm
Condition : Pre-Owned
Box and Papers : Box & Papers
Case Material : Stainless Steel
Warranty : 12-Months Warranty
The wrist model's wrist size is 7inch

Otsuka Lotec is a Japanese watch brand that was established around 2008 by Jiro Katayama, an industrial designer who taught himself the craft. His journey into watchmaking began when he bought a lathe, which sparked his interest in creating watch cases and understanding how watches function. By 2012, he was selling his unique timepieces from his workshop in Otsuka, Tokyo. Katayama draws inspiration from 20th-century design, including vintage 8mm cameras and car gauges, which gives his watches a distinctive look. In 2024, he achieved recognition by winning the prestigious GPHG Challenge Watch Prize for his No. 6 model. This particular watch features a creative design inspired by an old 8mm camera and includes a special jump-hour function that makes it stand out. Otsuka Lotec produces its watches in small quantities, mainly for the Japanese domestic market.