Ø1.00 x 0.35mm, Seagull, with Hole
J66704- End stone cap with hole through the middle
- This hole is for solving air damping and negative air pressure problems.
- The 5Hz ultra-high balance wheel vibrates 300 times per minute; air damping and negative air pressure are the most prominent issues, and the through-hole design is a targeted optimization solution.
- Zenith El Primero 3600, TAG Heuer Cal.36, and the modified 7750/ST19 with a 36,000 rpm frequency.
£3.95
PACK*10
