Vintage French-Made Convex Mineral Glass for Hunter Pocket Watches Size Range: 18 to 18-15/16

This convex mineral glass is designed specifically for hunter-style pocket watches and originates from France, a country with a rich and respected horological tradition. These pieces are new old stock, preserved in outstanding condition — making them exceptionally hard to find today.

Crafted from high-grade mineral crystal, each glass offers superb clarity, scratch resistance, and long-lasting durability. The beautifully domed convex shape ensures a perfect fit and authentic look for vintage hunter-case watches, making them ideal for restoration or replacement.

We currently stock over 80 different sizes in this French-made series.
👉 Be sure to explore our other listings to find the exact size you need.

Features:

• Authentic French vintage stock

• Convex mineral glass – clear, domed, and scratch-resistant

• Size range: 18 to 18 15/16 using the X/16 Ligne System (40.604 mm to 42.719 mm)

• Ideal for watchmakers, restorers, and collectors

• Hard to find in this original condition

• Available Sizes (X/16 Ligne System):

  • 18 → 40.604 mm
  • 18 1/16 → 40.745 mm
  • 18 2/16 (17 1/8) → 40.886 mm
  • 18 3/16 → 41.027 mm
  • 18 4/16 (17 1/4) → 41.168 mm
  • 18 5/16 → 41.309 mm
  • 18 6/16 (17 3/8) → 41.450 mm
  • 18 7/16 → 41.591 mm
  • 18 8/16 (17 1/2) → 41.732 mm
  • 18 9/16 → 41.873 mm
  • 18 10/16 (17 5/8) → 42.014 mm
  • 18 11/16 → 42.155 mm
  • 18 12/16 (17 3/4) → 42.296 mm
  • 18 13/16 → 42.437 mm
  • 18 14/16 (17 7/8) → 42.578 mm
  • 18 15/16 → 42.719 mm

📘 Need help converting Ligne sizes to millimeters?
Check out the article in the link below to learn how to convert sizes using both the X/16 and X/8 Ligne systems:
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