Longines HydroConquest 39mmvsOrient AC0Q-40 Diver

lug2lug doesn't sell watches. Buy links open the brand's or seller's own site. Some links are affiliate links: lug2lug may earn a commission at no extra cost to you. Disclosures

Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Longines HydroConquest 39mm at true scale

HydroConquest 39mm

Orient AC0Q-40 Diver at true scale

AC0Q-40 Diver

Diameter

39mm

39.9mm

Lug-to-Lug

n/a

46.5mm

Thickness

n/a

12.8mm

Water Resistance

300m

highest

200m

Power Reserve

n/a

40h

MSRP

$1,275

$370

lowest

Movement

L633

Orient F6722

Case

5 specs
Diameter
39mm
39.9mm
Thickness
n/a
12.8mm
Lug-to-Lug
n/a
46.5mm
Lug Width
n/a
20mm
Water Resistance
300m
200m

Crystal & Dial

1 specs
Dial Color
n/a
Black

Movement

6 specs
Caliber
L633
Orient F6722
Beat Rate
0 vph
21,600 vph
Power Reserve
0h
40h
Jewels
0
22
Hacking
No
Yes
Hand-winding
No
Yes

Pricing

1 specs
MSRP
$1,275
$370
Keep your wishlist and collection together in the appExplore the app

Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Longines HydroConquest 39mm

Owners widely praise the Longines HydroConquest 39mm for its excellent value, comfortable wearability on smaller wrists, and elegant design. Reviewers highlight its crisp 120-click bezel, high-quality steel bracelet, and finishing comparable to more expensive timepieces. Some owners note mediocre lume performance and the use of split pins for bracelet sizing. Accuracy is reported around 5 seconds per day. Overall, owners rate the Longines HydroConquest 39mm highly for its exceptional value and comfortable, elegant design.

Orient AC0Q-40 Diver

Owners praise the Orient AC0Q-40 Diver Watch for its value, sapphire crystal, and durable build quality, with many appreciating the 39.9mm case size for its smaller, trendy appeal and the raw steel bezel for a vintage look. The bracelet features folded end links, and while the in-house automatic Orient F6722 movement is considered a good workhorse, the watch is not ISO certified for diving, though suitable for swimming. Unless a purple dial is specifically desired, other color options are recommended. On balance, owners rate the Orient AC0Q-40 Diver Watch highly for its appealing design and value proposition in a compact package.

Similar watches

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

DiscussionNot started

Also compared

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