Longines 27M-420, Crown wheel

• LONGINES original part from a NOS movement.
  

• Fits cal: 27M, 27MS
  

Data: Longines 27M

• 17 jewels, manual winding, sub second.
• Size: 12'''  27,0 mm.
• H: = 3.2 mm.
• N: = 18.000 A/h.
• Power reserve: 40 h.

Versions:

• 27M:      sub second, flat hairspring, H=3,20 mm.
• 27MS:    sweep second, flat hairspring, H=4,30 mm.
• 27M:      shock resist, sub second, flat hairspring.
• 27MS:    shock resist, sweep seccond, flat hairspring.