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If you could peel back the layers of the sun and moon to see their cores, wouldn’t you? Well now you can. The added Open Heart showcases all of the mysteries of the universe in the palm of your hand.

41.5mm M
Silver, White
In Stock

Sorry, we only ship within the US and Canada.

SKU: RA-AS0102S10B

The Specs

Read on and explore all the details.

As a slightly slimmed down version of the open heart model that was introduced two years ago, this new model adopted bar index hour markers instead of Roman Numerals. Its mirror-polished case are translated to the hands and dial hardware.

The open heart window sits at the nine o’clock position while the day and night register is below at the six. As mentioned, the entire collection has been known for its incredible depth and attention to detail, and none of that is lost with the open heart variation. With a little help from its slightly domed sapphire crystal, a side view of the dial will showcase all of its ornate articulations, including the depth and layering between the open heart window and the movement itself. Dimension-wise, the RA-AS01 Open Heart measures just 41.5mm wide and 13.8mm thick. It is powered by the new automatic/mechanical caliber F6L24, and fully viewable through the exhibition case back. Unlike the deployant claps seen on similar models, a strap and buckle was included to conform to its slimmed profile. The RA-AS01 will be available in two colorways: white, and mother of pearl blue, which has not been seen since the limited edition Kamasu model.

Front View


size without crown


lug width

Side View



F6L24 Caliber Automatic, Hand-winding, Hacking Movement

Power Reserve:
Approximately 40 hours

Open-Heart, 24-Hour Dial, Exhibition Caseback


Dial Color:

Case Material:
Stainless Steel

Case Diameter:
41.5 mm without crown

Lug-to-Lug Length:
47 mm

Case Thickness:
13.8 mm

Water Resistance:
30 m

Push / Pull

Bezel Material:
Stainless Steel

Bezel Function:

Band Material:
Leather (Black)


Lug Width:
20 mm

Warranty Type:
1 Year Orient Watch USA Warranty

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