Longines HydroConquest Automatic Chronograph Watch 41mm L3.673.4 ALL S.S. Wristwatch

Watch Overview

We are proud to offer this authentic Longines HydroConquest men's chronograph Watch, reference L3.673.4, a finely crafted timepiece that blends timeless style with reliable engineering. This timepiece is powered by an original automatic movement caliber ETA-Valjoux 7750 and made in Switzerland. It is in very good condition, perfect for collectors or enthusiasts who appreciate quality and history.

Product Details

General Specifications

• Brand: Longines
• Type: wristwatch
• Model: HydroConquest
• Reference: L3.673.4
• Year / Era: -
• Gender: Men's
• Country of Manufacture: Switzerland

Dial & Display

• Display: Analog
• Color: Sunburst Gray
• Features: Arabic numerals; minute track; sweep chronograph second hand, small seconds at 9, 30-minute counter at 12, 12-hour counter at 6; date window at 3:00

Movement

• Type: Automatic
• Caliber: ETA-Valjoux 7750
• Jewels: 25
• Movement Functions:
  • Self-winding
  • Chronograph
  • Central hours, minutes and chronograph seconds
  • Sub-seconds at 9:00, 30 minutes counter at 12:00, 12 hours counter at 6:00
  • Hacking seconds
  • Date at 3:00 with quick-set
• Power Reserve: 48h
• Frequency: 28,800vph

Case & Band

• Material: Stainless Steel
• Case Size: 41mm
• Case Shape: Round
• Bezel: Uni-directional rotating, stainless steel
• Crystal: Scratch‑resistant sapphire crystal
• Back: Screwback
• Crown: Signed, screw-drown
• Water Resistance: 30 bar / 300 meters / 1000 feet
• Band Type: Silver-tone stainless steel link bracelet that it will fix to a wrist up to 8 1/2" (21.6cm)

Additional Info

• Box & Papers: YES – Includes a generic presentation box and papers for display
• Condition: Very good – all original, fully functional, keeps excellent time
• Extras: Professionally inspected for our watchmaker to ensure proper operation. It is ready to wear.

Extended Details

Movement Markings:	Case Back Markings:	Measurements (mm):
Longines	EFCo - Longines - Hydro Conquest - ALL Stainless Steel - Swiss Made - L3.673.4	Case Diameter 41 Case Diameter w/Crown 46.3 Case Lug to Lug 51 Case Thickness 15.5 Lug Width 21 Band Width 21

History & Legacy of Longines

"Every Longines is also a fine piece of jewelry."

About Second Hand Horology

At SECOND HAND HOROLOGY, we offer a curated selection of watches ranging from vintage to modern, including both brand-new and pre-owned timepieces. We’re committed to quality, accuracy, and integrity.

Our listings feature:

• Professional, unedited photography
• Clear and honest descriptions
• Thorough inspection
• Secure packaging

We also warmly invite you to visit our physical shop and explore the collection in person.

Contact Us

We appreciate you checking out our listing! Don’t hesitate to reach out with questions, offers, or just to talk watches — we love what we do and enjoy connecting with fellow enthusiasts.

Thank you for your business—we truly appreciate your support and look forward to serving you again in the future!

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