Citizen Promaster Diver Automatic vs Orient Kamasu

Side-by-side comparison of specifications and features

CitizenPromaster Diver Automatic

NY0040-09E

OrientKamasu

RA-AA0001B19A

Key Differences

Best Value

Citizen Promaster Diver Automatic (NY0040-09E)

Starting from $265

Biggest Price Drop

Orient Kamasu (Ref. RA-AA0001B19A)

-5.7% in 30 days

Price Comparison

Citizen Promaster Diver Automatic

MSRP

$400

New

$265

Used

$320

Orient Kamasu

MSRP

$375

New

$463

Used

$243

MSRP New (Amazon) Used (eBay)

Comparison of Citizen Promaster Diver Automatic, Orient Kamasu
Specification	Citizen Promaster Diver Automatic	Orient Kamasu
Pricing
MSRP	$400	$375
New Price	$265	$463
Used Price (Low)	$320	$243
Used Price (High)	$1,091	$537
30-Day Trend	↑ +0.6%	↓ -5.7%
Used Price Range	$320 - $1,091	$243 - $537
Identity
Reference	NY0040-09E	RA-AA0001B19A
Nickname	N/A	N/A
Style	Diver, Tool	Diver, Tool
Release Era	2020s	2010s
Dimensions
Diameter	42mm	41.8mm
Thickness	N/A	12.8mm
Lug Width	N/A	22mm
Lug to Lug	N/A	47mm
Movement
Movement	Automatic	Automatic
Power Reserve / Battery	N/A	N/A
Accuracy	N/A	N/A
Case
Case Material	Stainless Steel	Stainless Steel
Crystal	Mineral Crystal	Sapphire Crystal
Water Resistance	200m (diving)	200m (diving)
Bezel	Unidirectional rotating	Unidirectional rotating
Dial
Dial Color	Black	Black
Luminous	Yes	Yes
Community
Review Rating	N/A	N/A
In Collections	N/A	N/A
On Wishlists	N/A	N/A
Forum Threads	N/A	N/A

Quick Summary

If you are deciding between Citizen Promaster Diver Automatic and Orient Kamasu, the real decision is usually about wrist presence versus easier fit. Start with fit first — case width and lug-to-lug usually matter more than secondary features if wrist comfort is a concern.

How to choose

The biggest practical difference is usually movement and upkeep. Start with wrist fit and movement preference, then use water resistance and price to break the tie.

Citizen Promaster Diver Automatic

Citizen Promaster Diver Automatic is a better fit for mechanical-watch enthusiasts, diver styling.

Orient Kamasu

Orient Kamasu is a better fit for mechanical-watch enthusiasts, diver styling.

Key Differences

Movement and upkeep

Citizen Promaster Diver Automatic: automatic movement

Orient Kamasu: automatic movement

Both use the same movement type, so maintenance differences are limited and fit or feature details should decide the purchase.

Size and wearability

Citizen Promaster Diver Automatic: 42mm

Orient Kamasu: 41.8mm · L2L 47mm

Fit is a real separator here — compare case width and lug-to-lug before deciding, especially if wrist comfort matters more than headline features.

Water resistance

Citizen Promaster Diver Automatic: 200m

Orient Kamasu: 200m

Water resistance is similar on paper, so focus on fit, features, and price instead.

Price and value

Citizen Promaster Diver Automatic: $265

Orient Kamasu: $320

These two often land in a similar price band — which usually means fit, features, and current deal quality matter more than the sticker price.

Style and use case

Citizen Promaster Diver Automatic: diver

Orient Kamasu: diver

Both lean into a similar diver use case — the choice is more about fit, features, and price than category.

Crystal and materials

Citizen Promaster Diver Automatic: mineral crystal · steel

Orient Kamasu: sapphire crystal · steel

Crystal choice can change long-term wear expectations — one may prioritize scratch resistance while the other keeps cost or vintage feel in check.

Choose Citizen Promaster Diver Automatic If...

Its fit, feature mix, and price align better with your daily use.

Choose Orient Kamasu If...

Its fit, feature mix, and price align better with your daily use.

Price and Value Notes

Citizen Promaster Diver Automatic usually offers the lower entry price — confirm current listings because marketplace pricing can move quickly.

These two often land in a similar price band — which usually means fit, features, and current deal quality matter more than the sticker price.

Where to Check Deals

Check current deals on Amazon and eBay using the buttons below — listing prices, seller quality, and condition can change quickly.

Check current deals on Amazon and eBay

Prices change often, so compare the latest listings and condition options before you buy.

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Citizen Promaster Diver Automatic

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $415 · Live listings

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Orient Kamasu

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $320 · Live listings

Affiliate links — WatchCompared earns a commission on qualifying purchases. This doesn't affect your price.

Comparison FAQ

Which one is better for smaller wrists?

Start with case width and lug-to-lug. The watch that looks smaller on paper is often the safer choice, but lug shape and thickness still affect how it wears.

Which is better for swimming or rough daily wear?

Use the water resistance row as the first filter. Higher ratings generally give more flexibility for swimming and water exposure, but strap choice and overall condition still matter.

Should I choose based on price alone?

Price matters, but the better buy is the watch that matches your fit, feature priorities, and use case. Check live listings first, then decide whether the price gap actually changes the ownership experience.