| Brand: | Miyota | 
|
|---|---|---|
| Family: | ||
| Height: | 5.55 mm | |
| Jewels: | 21 | |
| Reserve: | 42 hours | |
| Frequency: | 21600 A/h | |
| Winding: | Automatic, Counter-Clockwise Automatic Winding | |
| Diameter: | 25.60 mm (11.5 ligne) | |
| Complications: | Hand Winding | |
| Hands: | Central Hour Hand, Central Minute Hand, Small Seconds Hand at 4:30 | |
| Production: – | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Calibre 8N40 is a skeletonized version of the Miyota 8218 small seconds movement in the Miyota 8200 family. It lacks the date wheel of the 8218 due to skeletonization but is otherwise similar.