Citizen watch eco drive strap wr100 mens ca4210 24e citizens avion is a vintage inspired timepiece reminiscent of transatlantic flights from the 1950s design cues taken from the golden age of travel include the rich brown leather strap with contrast stitching oversized luminous numbers and classic date function in a stainless steel case with black dial this timepiece now has the added 15th second chronograph and 1224 hour time features