Outline star
Outline star
Outline star
Outline star
Outline star
Filled star
Filled star
Filled star
Filled star
Filled star

Barrel 42mm Automatic

Koa Gunmetal

Regular price $349
$349 Regular price $449 Sale price

11 Year Anniversary Sale

Skip The Line (Priority Processing)



Default Title

Charcoal Leather Band - $49

Default Title

Bourbon Leather Band - $49

  • Ships in 1 business day
  • Free returns in U.S.
  • 1 tree planted for each watch sold
  • Handcrafted Quality | Designed in USA
  • 1 year warranty



Wood: All-Natural Hawaiian Koa Wood

Steel: Stonewashed 316L Stainless Steel

Movement: Miyota 9015 automatic movement

Power Reserve: 42-Hour Power Reserve

Caseback: Skeleton

Jewels: 24

Band: Steel

Dial: 42mm

Case Size: 42mm

Case Thickness: 10.80mm

Band Width: 21mm

Glass: Scratch Resistant Crystal

Warranty: 1 Year

Specs and Details


Water Resistance: 5ATM

Date Function: DATE

Watch Functions: 3 Hand w/ Date

Dial Type: Analog

Hour Markers: 2 Layer Steel/Material

Bezel: Hawaiian Koa

Crown: Push/Pull

Band Type: Bracelet

Band Materials: Stonewashed Steel w/ Hawaiian Koa Links

Band Color: Stonewashed

Band Width (Attachment Width): 21mm



We offer a comprehensive 12-month manufacturer's warranty on all new watch and ring purchases, excluding final sale items. If the watch or ring proves to be defective in material or workmanship under normal use, it will be repaired or replaced free of charge at the discretion of the Original Grain Warranty Department. Learn More.

Shipping & Returns


All orders shipped in the United States are sent via FedEx or USPS; or a combination thereof.

During December, please allow 3-4 business days to process and ship the order once it has been placed.

Please note that Saturday and Sunday are not considered business days.

View full details

Premium Miyota 9015 Automatic

An Iconic Piece, Only Upgraded

Featuring Miyota’s signature 9015 premium automatic movement with a 42-hour power reserve, 24 jewels, and date function. As well as an ultra-durable sapphire crystal glass cover and exhibition case back.

The Story Behind Our Hawaiian Koa Wood

Ancient Hawaiians used it to sculpt images of their gods. It was the wood of choice when natives built outrigger canoes for their kings and queens. And today - centuries later - it remains one of the finest textured woods in the world. It is Koa, and it is Hawaiian royalty.

Koa Gunmetal Barrel Automatic 42mm

Customer Favorites

1 of 12