Alpina 273 (18.5'''), Winding stem, DCN: 1620

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  DCN no: 1620
• 
  Thread: 150
• 
  Fits cal: 273, 274, 277, 278 (18.5'''). Base caliber: Unitas: 31

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  A: = 120
• 
  B: = --
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  C: = 180
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  D: = 150
• 
  F: = 514

Versions:

• 
  273: H: = 5.35 mm, Lép.
• 
  274: H: = 5.35 mm, Sav.
• 
  277: H: = 4.15 mm, Lép.
• 
  278: H: = 4.15 mm, Sav.