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Otsuka Lotec No.5 Kai Skeleton Stainless Steel

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Condition Rank
N Brand new / unused (including display items and long-term storage items)
Brand
Otsuka Lotec
Model Number
No.5 Kai
Gender
Men's
Material
Stainless Steel
Accessories
Storage box, instruction manual, warranty card
Warranty Card Date
October 2026
Case Size
Approx. 40.5mm
Country of Origin
Japan
Year of Production
2026
Movement
Automatic
Display Type
Analog display
Case Shape
Round Face
Dial Color
Skeleton
Remarks
The Otsuka Lotec "No.5" was the brand's first production model, released in 2012 by self-taught watchmaker Jiro Katayama. Instead of conventional hands, it shows the time with a regulator-style display using an hour disc at 12 o'clock and a minute disc at 6 o'clock, combined with a central small seconds and a date display. Two ball bearings visible from the front are part of the design, giving it the mechanical look of a measuring instrument. The movement is based on the Miyota automatic Cal.8215, modified by Mr. Katayama to suit the display mechanism. The model name comes from the order of the case designs. It was made until 2022 and became the design origin of the No.5 Kai introduced in 2025. Brand new and unused.
Item Number
W202610121
About the rank

N: New and unused items (including display items and long-term storage items)
S: Used only a few times, in excellent condition with very little signs of wear (very slight scratches. Items refurbished to like new are also classified as this rank.)
A: It is in good condition overall with little signs of use (there are some minor scratches).
AB: Signs of use. Overall in relatively good condition (some scratches).
B: Signs of use. Condition that does not interfere with normal use (There are obvious scratches and stains, as with everyday use.)
BC: Shows signs of use. Some repairs or replacements are necessary, but most of the item is still usable (there are many scratches and stains, etc.).
C: Junk (not tested, not working properly)