1948 Longines Tank Case 17 Jewels Cal. 23Z Swiss 26mm Swiss Wristwatch 10K G.F.

Watch Overview

Offered here is a vintage Longines tank-style mechanical wristwatch, dating to approximately 1948 based on the movement serial number.

This is a manual-wind timepiece powered by the original Longines mechanical movement, caliber 23Z, featuring 17 jewels and a sub-seconds hand. This Swiss-made watch operates at a frequency of 18,000 vibrations per hour and offers an approximate power reserve of 44 hours. SERVICED ON 12/2025

The watch features a champagne dial that has developed an attractive vintage patina over time. It is accented by applied Arabic numerals, hour markers, a minute track, and matching hands. The sub-seconds register is positioned at 6 o’clock.

It is housed in a 26mm square case with lugs design, crafted in 10K yellow gold filled with the original signed crown. The watch is fitted with a brand-new brown two-piece leather strap, complementing its classic and elegant design.

Fully inspected and authenticated, this timepiece remains in very good vintage condition, showing signs of wear consistent with age. It is running properly and ready to wear and enjoy.

Product Details

General Specifications

• Brand: Longines
• Type: Wristwatch
• Year / Era: 1948 - Vintage
• Gender: Men's
• Country of Manufacture: Switzerland

Dial & Display

• Display: Analog
• Color: Champagne
• Features: Arabic numerals, minute track, sub-seconds register

Movement

• Type: Manual-wind
• Caliber: Longines 23Z
• Jewels: 17
• Movement Functions:
  • Sub-second hand
  • SERVICED ON 12/2025
• Power Reserve: Approx. 44 hours
• Frequency: 18,000 vph

Case & Band

• Material: 10K yellow gold filled
• Case Shape: Square / Tank
• Bezel: Fixed, smooth
• Back: Snap-on
• Crown: Signed, push-pull
• Water Resistance: -
• Band Type: Brown leather strap
• Case Back Markings: Longines -Wittnauer Watch Co. INC. Geneva Montreal 10K Gold Filled

Case Measurements (mm)

• Case Size: 26.3
• Case Diameter w/Crown: 28.1
• Case Lug to Lug: 40.8
• Case Thickness: 10.6
• Lug Width: 16
• Band Width: 16

Additional Info

• Box & Papers: NO
• Condition: The watch is in good condition, showing signs of wear consistent with age and use
• Extras: This timepiece has been fully inspected and authenticated by our in-house watchmaker, confirming that it runs accurately.

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 and clear, transparent descriptions. Every watch is thoroughly inspected and securely packaged to ensure a confident, seamless buying experience.

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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