Seiko's original Time Sonar from the 1970s remains a popular vintage timepiece. The 5 Sports SRPJ47 Automatic is a modern interpretation. It retains the original's translucent orange dial, allowing for views of the day and date discs that power the complication at 3 o'clock. The stainless steel case is a wearable 42.5mm, with a presentation caseback and a dial-matching black and orange insert for the rotating bezel. Luminous hands and markers make it readable in the dark, and the stainless steel bracelet completes the retro aesthetic.