reference 6204 in stainless steel Model: Sub Aqua Material: stainless steel Reference N°: 6204 Year: 1954 Case N°: 42439 Caliber: F12352 Movement N°: 59455 Bracelet: leather strap Dimensions: 37 mm This very rare example represents a real prototype that shows a different name compared to the one used later for the same model. In fact, the dial shows the word Sub-Aqua instead of Submariner. Reference 6204, the first Submariner generation and was presented at the Basel Fair in 1954.