The first IWC Da Vinci watch was a landmark piece in terms of its movement technology. Equipped with the first Swiss-made quartz movement - which had been jointly developed by several renowned Swiss watch manufacturers - it measured time ten time more accurately than a tested chronometer movement.
As diving as a sport grows during the 1960s, IWC reacts to this development with the launch of its first diver`s watch, the "Aquatimer 812". Its case is watertight down to a depth of 200 metres, and the rotatable bezel of adjusting the diving time is situated under the glass to prevent it being moved accidentally during the dive.
For over 30 years, the classically elegant Portofino has captured the laid-back lifestyle of the Mediterranean and the very essence of understatement and good taste. With its Portofino range of watches, IWC resumed its tradition of the classic, functional round gold cases. Reference 5251, with its outstanding horological features, marked this start. In 1984 it became the lead model of the Portofino family.