• Brand: Longines
• Reference Number: L2.537.4.72.6
• Case Material: Steel
• Size: 37MM
• Year: 2026
• Box: Yes, inner and outer boxes
• Papers: Yes, March 2026 card + booklet + hangtags
• Condition: Excellent

A beautiful example of the Longines Ultra-Chron Classic, reference L2.537.4.72.6, featuring a 37mm stainless-steel case, silver dial and stainless-steel bracelet.

The Ultra-Chron draws on Longines' long history with high-frequency mechanical movements. Its automatic movement operates at 36,000 vibrations per hour (5 Hz), delivering the high-beat performance for which the Ultra-Chron name is known.

This 2026 example is in excellent condition and comes as a complete full set with box and papers, including its Longines warranty card dated March 13, 2026. The watch is covered by the Longines factory warranty through March 13, 2031.

The bracelet includes all original links, and the watch is running beautifully on the timegrapher.