The Ultra-Chron ref. 8353 features a cushion-style stainless steel case and a date window at 4 o'clock, powered by the high-beat Cal. 431 chronometer movement running at 36,000 bph.

• Condition: Pre-owned with visible scratch near 12 o'clock and hairline scratches on the case.
• Movement Rate: 36,000 beats per hour
• Case Size: 35mm diameter
• Crystal Type: Unsigned plexi

This 1973 Longines Ultra-Chron Chronometer features a dark grey/charcoal dial and a stainless-steel cushion case. It's powered by a high-beat automatic movement, fully serviced in September 2025, and comes on its original signed Longines mesh bracelet.

• Condition: Good condition with honest wear from use, light scratches and small marks as expected for age
• Bracelet Type: Original signed Longines mesh bracelet with multiple micro-adjust positions
• Movement Caliber: cal. 431 (36,000 bph)
• Water Resistance: Not waterproof due to vintage construction

a 1969 Longines Ultra-Chron with a High-Beat Chronometer Cal. 431 movement, serviced in August 2025.

• Caliber: Cal. 431
• Service date: Aug 2025

A vintage Longines Ultra-Chron Chronometer from around 1973, featuring a high-beat automatic movement and a clean dark grey dial.

• Condition: Pre-owned, serviced in September 2025
• Movement Caliber: cal. 431
• Movement Beats Per Hour: 36,000 bph
• Water Resistance Status: Not waterproof