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TIMEPIECE EDUCATION

CASE

CASE


Cases can be made from a variety of materials that include:

Platinum

  • Considered noble, rare and hard
  • Hard to work with
  • Stamped as "950"
  • 4.5 on Mohs Scale

18K Gold

  • Yellow, rose and white. K is karat weight
  • 24K is purest and softest
  • 18K is 75% gold
  • 2.5 – 3 on Mohs Scale

14K Gold

  • Rarely used in Swiss watches
  • 585 parts gold
  • 3.0 – 3.5 on Mohs Scale

Gold Plate

  • Rarely used in Swiss watches
  • Gold over base metal
  • Wears off over time

Stainless Steel

  • Most popular
  • Harder than gold to scratch
  • Can be refinished to original state
  • 5.5 – 6 on Mohs Scale

Titanium

  • Lightweight and durable, space-age material
  • Hypoallergenic
  • 6.0 on Mohs Scale

Ceramic

  • Lightweight, man made, space-age material
  • Scratched only by diamond
  • 8 – 8.5 on Mohs Scale

Tantalum

  • Dark, dense, hard
  • Highly resistant to corrosion
  • 6.5 on Mohs Scale

Tungsten Carbide

  • Dense metal-like substance
  • High strength, hard and rigid
  • 7.5 on Mohs Scale

PVD

  • Process by which a layer of material is bonded to base metal
  • Improves hardness and wear resistance

Diamond-like Carbon (DLC)

  • Bonded to the base watch metal
  • Nearly as hard as natural diamond
  • Slicker than Teflon