The 5146 series was launched in 2005, taking over for the Ref. 5035. However, the "/1" in this reference is the crucial detail—it signifies that the watch was originally sold on a factory-integrated metal bracelet. The -010 suffix specifically denotes the Slate Grey (Sunburst) dial. This variant was introduced to provide a more monochromatic, modern alternative to the traditional cream and "Fuji" white dials. Along with the rest of the 5146 family, this reference was discontinued in 2021. While leather-strap versions are relatively common, the full white gold bracelet models were produced in much lower quantities due to their significant retail price premium. Models from mid-2009 until 2021 bear the Patek Philippe Seal on the backplate.
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