Grand Seiko Heritage SBGW321

The Grand Seiko Heritage SBGW321 takes an 18 mm watch band.

Grand Seiko · Heritage

18mm

lug width

Bands that fit

Cut and stitched in Milano, in the width this watch takes.

Any 18 mm band fits this reference, in leather, rubber or fabric.
Inside the Heritage family the lug width is not one number: it runs 14, 15, 18, 19, 20, 21 mm. This reference is the 18 mm one, so a band bought for another Heritage may not fit it. Why the size changes inside a family →
18 mm is not a common size: only 3,965 of the 41,485 watches measured take it (9.6%), so ready-made choice at this width is narrower than at 20 or 22 mm. Every watch that takes 18 mm →