Longines · L897
L897
A restrained annual-calendar automatic that displays the month and date together in a window.
At a glance
- Type
- Automatic mechanical
- Display / complication
- Annual calendar
- Architecture
- Automatic winding, central seconds, month and date annual calendar
- Timebase
- 25,200 vph / 3.5 Hz
- Power reserve
- Up to 72 h (current cited watch)
Reference sources reviewed 7 November 2026. Published specifications, not independent measurements. Versions and complete-watch specifications can differ; fields without a verified figure are omitted or identified.
Find it in a watch
Longines Master Collection L2.910.4.78.3
An example from the linked references. Check the exact model and production generation.
What distinguishes it
Look beyond the reference.
The calendar handles 30- and 31-day months; Longines specifies one date correction at the end of February. A month window can resemble a day-date display, but the information and calendar logic are different.
For the enthusiast
The current L2.910.4.78.3 page specifies a 3.5 Hz beat rate and up to 72 hours. Use the exact watch reference and manual when comparing older L897 executions or setting the calendar.