Side by side

Autran & Viala OPERA 41vsCastor Watches KOI DARK

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Add a watch
OPERA 41
Autran & VialaOPERA 41
MSRP $421
KOI DARK
Castor WatchesKOI DARK
Buy from Autran & Viala ↗
Buy used on eBay ↗
Buy from Castor Watches ↗
Buy used on eBay ↗

At a glance

11 of 29 specs differ
Diameter
OPERA 4141mm
KOI DARK38mm
Power Reserve
OPERA 4140h
KOI DARK—
Water Resistance
OPERA 41100m
KOI DARK50m
MSRP
OPERA 41$421
KOI DARK—

Full specifications

Case

6 specs
Diameter
41mm
38mm
Thickness
12mm
7mm
Lug-to-Lug
46mm
—
Lug Width
20mm
18mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
100m
50m

Crystal & Dial

2 specs
Crystal
Sapphire
Mineral
Dial Color
Black
Copper

Movement

2 specs
Caliber
—
Miyota 2035
Power Reserve
40h
—

Pricing

1 specs
MSRP
—
—
Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Balticus Watches Balticus Perun Chrono Moonphase - Limited Edition
Balticus Watches
Perun

Balticus Perun Chrono Moonphase - Limited Edition

Ref. balticus-perun-chrono-moonphase-limited-edition
42mm·Quartz·200m WR
$295MSRP
—Used
Castor Watches ÁRBOL DARK
Castor Watchesmicro

ÁRBOL DARK

2 variantsRef. arbol-dark-cobre-artesanal-38mm
38mm·Quartz
—MSRP
—Used
Smith & Bradley SANS-13 Silverback
Smith & Bradley

SANS-13 Silverback

Ref. sans-13-silverback-tactical-watch
42mm·Quartz·300m WR
$295MSRP
—Used
Castor Watches LEON
Castor Watchesmicro

LEON

Ref. linea-artesanal-leon
38mm·Quartz
—MSRP
—Used
Tissot Seastar 1000 GMT
Tissot

Seastar 1000 GMT

Ref. t1208521105100
40mm·Quartz·300m WR
$575MSRP
—Used
Tissot PR 100 Tour de France
Tissot

PR 100 Tour de France

Ref. t1504171105100
40mm·Quartz·100m WR
$515MSRP
—Used
Mad Hudson Watches CD Watch
Mad Hudson Watchesmicro

CD Watch

Ref. cd-watch-riki-prosper
40mm·Quartz
—MSRP
—Used
Mad Hudson Watches Dogma
Mad Hudson Watchesmicro

Dogma

Ref. dogma-watch-bryce-wong
40mm·Quartz
—MSRP
—Used
All alternatives to the OPERA 41 →All alternatives to the KOI DARK →
Explore the full catalog

Follow this matchup

Get a note when Autran & Viala OPERA 41 vs Castor Watches KOI DARK gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.

Balticus Watches Balticus Perun Chrono Moonphase - Limited EditionvsCastor Watches KOI DARKCastor Watches KOI DARKvsSmith & Bradley SANS-13 SilverbackCastor Watches KOI DARKvsTissot Seastar 1000 GMTCastor Watches KOI DARKvsTissot PR 100 Tour de FranceAutran & Viala OPERA 41vsCastor Watches ÁRBOL DARKAutran & Viala OPERA 41vsCastor Watches LEON
Edit this comparisonAdd another watchExplore more 37–42mm watches