Titanium Zelos watches

The Titanium Field Guide lists 4 titanium Zelos watches, from $529 to $899. Every entry is verified for titanium content, sourced against the maker, and dated.

• Hammerhead V3 300M Titanium
  Grade 2 · 44.0 mm · Seiko NH35 · $529
• Mako V3 300M Titanium
  Grade 2 · 40.0 mm · Miyota 9015 · $549
• Swordfish 40 Titanium
  Grade 2 · 40.0 mm · Seiko NH35 · $549
• Spearfish Titanium
  Titanium (hardened ~1200 HV) · 40.0 mm · Sellita SW300 + TT651 module · $899