Seiko 6217, 6245, 6246 Mainspring

Genuine Generale Ressorts Swiss-made replacement mainspring for Seiko 6201B, 6205B, 6206A, 6206B, 6216A, 6217A, 6218A, 6245A and 6246A automatic movements. 

These vintage Seiko movements include some of the company’s most collectible watches. The 6217A powered Seiko’s famous 62MAS, the company’s first professional dive watch, while the 6245A and 6246A were used in the highly regarded 62GS Grand Seiko. The 6200-series movements were also used across a variety of other Seiko automatic watches from the 1960s.

If you’re servicing one of these vintage Seiko movements, a high-quality replacement mainspring is important for proper fit and performance. A poorly made mainspring can cause fitment problems with the arbor or barrel and may not deliver the amplitude expected from a properly serviced movement. Here, there’s no mystery about what you’re installing: a branded mainspring made by Generale Ressorts, a leading specialist manufacturer of watch mainsprings.

Is GR2533X compatible with the Seiko 6217A?

Yes. GR2533X is a replacement mainspring for the Seiko 6217A used in the vintage 62MAS, as well as a number of related Seiko 6200-series movements and the 6245A and 6246A Grand Seiko movements.

Compatible Seiko Movements

6201B
6205B
6206A
6206B
6216A
6217A
6218A
6245A
6246A

Specifications

Manufacturer: Generale Ressorts
Manufacturer Part Number: GR2533X
Type: Automatic mainspring
Height: 1.05 mm
Thickness: 0.11 mm
Length: 360 mm
Barrel Diameter: 10 mm

Amplitude Watch Parts ships from the USA, so there’s no need to worry about long shipping delays or tariffs.