lug2lug
BrowseCompareNewsCommunityMy Watches
BrowseCompareNewsCommunityMy Watches
Theme
Popular microbrands:Christopher Ward·Baltic·anOrdain·Atelier Wen·Boldr·Bremont·Dan Henry·DOXABrowse all →
Best, by the specs:Best dress watches·Diver under $5,000·Chronograph under $5,000·Sport under $5,000·GMT under $5,000·Field under $2,000·Best tool watches·Pilot under $2,000All rankings →
Glossary:Lug-to-Lug·Water Resistance·Chronograph·GMT·Automatic·LumeBrowse all →
Tools:Collection tracker·Wrist-fit calculator·What should I buy?·Value retention rankings·iPhone app
Lug2Letter
Watches worth knowing about, weekly.
Curated discoveries, founder spotlights, and the occasional deep-dive.
Now on iPhone
Download on theApp Store
TermsPrivacyCopyrightDisclosuresContactContribute

Independent reference site · not affiliated with any brand · contains affiliate links

© 2026 Lug2Lug LLC · Prices are estimates and not offers

Loading watch
Home/Browse/Undone/Rikishi Ao — Blue
Undone Rikishi Ao — Blue
Click to inspect
Ask the communityStart a discussion about the Rikishi Ao — Blue — get takes from other collectors.Ask →
Undone · Rikishi Ao — Blue

Undone Rikishi Ao — Blue

$595Sold out
Buy from UndoneFind used on eBay

Case

Diameter
40mm
Thickness
13.8mm
Material
Stainless Steel
Water resistance
100m

Crystal & dial

Crystal
Sapphire

Movement

Caliber
Seiko NE57
Type
Automatic
Hacking
No
Hand-winding
No
Complications
Time only

Design language

Case shape
round
Dial style
textured
Sub-dials
1
Bezel
rotating
Bracelet
leather
Hands
baton

AI-detected from the product image

Alternatives

01The connection engine

More like this.

Undone Rikishi Aka — Red

Undone

Rikishi Aka — Red

40mm · Automatic$595

Undone Rikishi Kuro — Black

Undone

Rikishi Kuro — Black

40mm · Automatic$595

Undone Rikishi Shiro Ao — White Blue

Undone

Rikishi Shiro Ao — White Blue

40mm · Automatic$595

Isotope Hydrium

Isotope

Hydrium

40mm · Automatic$1,701

Smiths COMMANDER

Smiths

COMMANDER

38mm · Automatic$365

Spinnaker Croft 42 Skeleton

Spinnaker

Croft 42 Skeleton

42mm · Automatic$435

View all alternatives

02The community take

Owners talk.

“
In a nutshell

The Undone Rikishi Ao — Blue is an automatic watch, with a 40mm stainless steel case, 13.8mm thick, powered by the Seiko NE57 movement. Water resistance is rated to 100m, under a sapphire crystal. Manufacturer MSRP is $595.

Open the discussion

On real wrists

No shots yet. Show how it wears.

03The paper trail

04The discussion

Talk about the Undone Rikishi Ao — Blue.