Titanium Seiko watches

The Titanium Field Guide lists 5 titanium Seiko watches, from $1,100 to $4,600. They span diver, other, dress. Every entry is verified for titanium content, sourced against the maker, and dated.

• Presage SARX055 (Titanium, Baby Snowflake)
  Titanium (super-hard coated) · 40.8 mm · Seiko 6R15 · $1,100
• Prospex Shogun Titanium (SPB191)
  Titanium (grade undisclosed) · 43.5 mm · Seiko 6R35 · $1,200
• Astron GPS Solar (SSJ027)
  Titanium (super-hard coated) · 41.2 mm · Seiko 3X62 · $2,200
• Astron GPS Solar (SSH157)
  Titanium (super-hard coated) · 43.3 mm · Seiko 5X83 · $2,500
• Prospex Marinemaster Professional 600m Titanium (SLA081, 60th Anniversary)
  Titanium (super-hard coated) · 45.4 mm · Seiko 8L45 · $4,600