Frederique Constant Runabout Gents Auto R/G WR50 FC-392RMN5B4 Red and Nivaflex mainspring

and Nivaflex mainspring

See here an excerpt from NHS (UK) dress code:

Seiko Presage SRPB43J features calibre 4R35 which is both a manual and self winding movement with an approximate 41 hour power reserve

and every watch undergoes strict quality control tests and inspection before leaving our factory

Frederique Constant Runabout Gents Auto R/G WR50 FC-392RMN5B4 Red and Nivaflex mainspringFrederique Constant Runabout Chronograph Automatic 42 mm watch. Model reference: FC 392RMN5B4. Stainless steel case plated with rose gold. Blue dial. Automatic movement. Blue calf leather strap with pin buckle. Swiss made. The watch comes in the original packaging, with a set of documents and 2 years warranty. Gender MENS Case Size 42MM Strap NAVY BLUE CALF LEATHER STRAP WITH ALLIGATOR EMBOSSING AND OFF WHITE STITCHING Dial NAVY BLUE DIAL WITH