MARK I (1960).
Applied logo,”gladio” or “paddle”minute and hour hands,four leaf clover on back case.High quality copper color Valjoux 72 first class finissage.No logo diver crown.Gladio-shaped little hands on subdials.
Please note:during the very early production,two different sets of hour and minutes hands were fitted.”gladio”(left)and classic paddle (right).
MARK I/B (1961)
Same as mark I,but new subdials hands.
Remarkable the absence of the word “tachymetre”on scale.
Little Saturn applied logo,same well refined movement like mark I,but new screw back with an oyster and writing ”sea pearl”.New subdials hands.
Similar to Mark II but new subdials hands and yellow plated movement(standard finissage,not very accurate like previous marks)
New caseback(Seapearl 300 and not only”Seapearl” like previous marks)new details,yellow standard finissage movement.
New dial,new hour and minute hands.Standard movement.Please note on the web many differences regarding colored chronograph hand,very often orange,and many little variations(lollipop hand for example).