Certina 17-351, Setting lever spring, no: 445

• 
  NOS Certina original part.
• 
  Fits cal. 17-35, 17-351, 17-36, 17-361

Versions:

• 
  17-35: automatic.
• 
  17-351: automatic, date.
• 
  17-36: manual wind.
• 
  17-361: manual wind, date.