IWC 852

• 
  Serial no: 1 399 104 (aprox: 1958).

Data: 852

• 
  21 jewels, automatic winding.
• 
  Size: 12.75''' 29.0 mm.
• 
  H: = 5.60 mm.
• 
  N: = 19.800 A/h.
• 
  Power reserve: 42 h.

Versions: 13''' (1952 - 1964).

• 
  85: center second.
• 
  851: center second.
• 
  852: center second (1952 - 1958).
• 
  8521: center second (1953 - 1958).
• 
  853: center second (1958 - 1963).
• 
  8531: center second, date, H=6.40 mm (1959 - 1964).

Versions: 12,5''' (1964 - 1996).

• 
  854: 21-25 jewels, center second, H=4.85 mm (1964 - 1976).
• 
  854B: 23-25 jewels, stop mechanism, H=4.85 mm (?).
• 
  8541: 21-25 jewels, date, stop mechanism, H=5.90 mm (1964 - 1976).
• 
  8541B: 23-25 jewels, date, stop mechanism, H=5.90 mm (1976 - 1996).