Had the opportunity to handle this Seiko Brightz model, SDGC030 recently. This is a Seiko X Cotton Club collaboration model and is powered by the 6R21 mechanical movement. It is a JDM model and is limited to 500 pieces.

Here is a pictorial review.

Dial:

Side profile:

Crown:

Lugs:

Caseback:

strap:

Additional photos:

Diameter: 44mm including crown
Lug width: 20mm
Thickness: 12.7mm
Water resistance: 10atm

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Seiko Brightz SDGC030 featured in this post is provided by

1 Commonwealth Lane
One Commonwealth #03-24
Singapore 149544
Tel: 6273 3355 Fax: 6278 8929
sales@bigtimesgp.com
http://www.bigtimesgp.com
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