Longines Conquest Conquest Quartz 29.5 Stainless Steel / Black - Diamond

Reference L3.277.4.57.6

Longines Conquest Quartz 29.5 Stainless Steel / Black - Diamond

About this watch

The Longines Conquest Quartz 29.5 boasts a round stainless steel case that is both sturdy and stylish, featuring a black dial with gem-set indexes for a touch of sophistication. The watch's durability is ensured by the use of resistant stainless steel, while the sapphire glass offers excellent clarity and scratch resistance. At its heart lies the Longines caliber L152, a quartz movement based on the reliable ETA 256.111, celebrated for its accuracy and featuring a jumping minutes display and date display for added practicality. With an impressive water resistance of 300 meters, this watch is perfect for both formal events and everyday adventures. Its elegant design and robust build make it versatile enough for any occasion, while its comfortable lug width of 15 mm ensures a secure fit on a variety of wrist sizes. This timepiece embodies a perfect blend of practicality, elegance, and durability, making it a statement of style and sophistication that you'll cherish for years to come.

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Key Features

Stainless Steel Case
Black Dial with Gem-Set Indexes
Sapphire Glass
Longines Caliber L152 Quartz Movement
Jumping Minutes Display
Date Display
300m Water Resistance

Specifications

Brand

Longines

Family

Conquest

Model

Conquest Quartz 29.5 Stainless Steel / Black - Diamond

Reference

L3.277.4.57.6

Movement

l152

Movement Features

Hours, Jumping Minutes, Seconds
Date

Case

Stainless Steel

Dial Color

Black

Crystal

Sapphire

Water Resistance

300

Current Listings

Longines HydroConquest 42mm

Longines - L3.788.4.96.6 · $1,900

This listing is for a brand new Longines HydroConquest 42mm blue dial watch, featuring a ceramic bezel and quick micro adjust bracelet.

Condition: Brand New In Box (BNIB)
Diameter: 42mm
Material: ceramic and lacquered

Posted at

May 26, 2026, 3:35 PM

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[WTS] Longines "Conquest" Swiss-Made 1970s/Early '80s Integrated Solid Link Bracelet, Calibre L.746.2 Ref.4384 (ETA 954.111) $425 (details/description in the comments)

Longines "Conquest" Swiss-Made 1970s/Early '80s Integrated Solid Link Bracelet, Calibre L.746.2 Ref.4384 (ETA 954.111) $425 (details/description in the comments)

This vintage Longines Conquest watch features a unique design with a subtle grey and light brown dial, integrated steel sports watch case, and a high polish stick indeces. It houses the Swiss-made ETA 954.111 quartz movement and has a comfortable solid link bracelet.

Posted at

May 25, 2026, 11:00 PM

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1960 Longines Conquest Ref. 9020 w/ Cal. 290 – Original Black Dial - $699

Longines - 9020 · $699

A 1960 Longines Conquest Automatic ref. 9020 with an original black dial, powered by the in-house Caliber 290, is being offered for sale. The watch features a 35mm stainless steel case with long, sculpted lugs and a slim profile.

Condition: Excellent condition with minor aging and light hairlines on the case
Dial: Original black dial
Case diameter: 35mm
Lug width: 18mm

Posted at

May 25, 2026, 9:08 PM

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Longines Hydroconquest 43mm -Like New

Longines - L3.782.4.56.6 · $1,180

This Longines Hydroconquest is a 43mm watch with a black dial, purchased new in April and still in fantastic condition.

Condition: Like New
Case size: 43mm
Lug to lug length: 53
Thickness: 11.90mm

Posted at

May 25, 2026, 6:20 PM

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Longines Hydroconquest 41mm - Black Dial

Longines - L3.781.4.56.6 · $975

A Longines Hydroconquest 41mm Automatic watch with a black dial, stainless steel case, and ceramic bezel.

Condition: Good condition, minor scratches/scuffs in sapphire and minimal wear marks on bracelet and clasp
Case size: 41mm diameter
Bezel material: stainless steel and ceramic
Bracelet type: original bracelet (and links)

Posted at

May 24, 2026, 3:31 PM

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Longines Hydroconquest Chronograph 41 Ref. L3.783.4 – Travel Box & Manual | $1,750

Longines - L3.783.4 · $1,750

The Longines Hydroconquest Chronograph 41 is a high-performance Swiss diver's watch featuring a blue ceramic bezel and screw-down crown, powered by the L688.2 column-wheel chronograph movement with a 54-hour power reserve.

Condition: Very good with minor usage marks
Movement: Longines L688.2, automatic column wheel chronograph with 27 jewels, 28,800 bph, and a 54-hour power reserve
Case size: 41mm diameter
Thickness: 15.6mm

Posted at

May 24, 2026, 12:47 PM

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