Longines Flagship Automatic Cal.340

It’s fascinating to delve into the history and details of the Longines Flagship model with the calibre 340 movement. The calibre 340 indeed stands out as a significant milestone for Longines, marking the last entirely new automatic movement designed and manufactured in-house by the company.

The use of an offset rotor in the calibre 340, as well as in the earlier Longines automatic movements like calibres 19 A and 14.17, is an interesting design feature. This unique rotor placement could have been a result of careful engineering considerations or an aesthetic choice. The fact that Longines continued to explore and develop movements with distinct features showcases their commitment to innovation in micro-mechanics.

The emphasis on a larger oscillating balance in the calibre 340 for improved accuracy aligns with scientific principles. A larger balance wheel generally provides greater stability, contributing to enhanced timekeeping precision. The calibre 340’s record-breaking accuracy further solidifies its reputation among enthusiasts of finely crafted timepieces during the late 1950s.