Illustration. The seconds hand sweeps, like the real movement.
Why it's interesting
The Master Collection's grand complication for everyday use: day, month, a pointer date, moon phase and a column-wheel chronograph on a barleycorn dial with blued hands. An old-school triple-calendar chronograph at a price that still feels generous.
Watch DNA. Filled tags are editorial; outlined tags come from the specifications.
The numbers
Verified specificationsSize
- Diameter
- 40mm
- Lug to lug
- 46.7mm
- Thickness
- 14.3mm
- Lug width
- 21mm
Because you like this…
Chosen for shape, size, colour, character and price. Rarely the same brand twice.
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About this page
Verified specifications, checked September 2026
Dimensions, water resistance, movement and crystal were checked against the sources below.
Column-wheel calibre L687.5 per the product sheet: day and month windows in the 30-minute counter at 12, 24-hour indicator with small seconds at 9, moon phase in the 12-hour counter at 6, and the date on a central pointer. The day and month windows aren't drawn. Launch year of this reference not found (aBlogtoWatch reviewed it in 2019). In August 2026 Longines introduced a 41 mm successor, L2.962.4.73.x (Monochrome); this 40 mm reference was still listed on longines.com in September 2026.
- longines.com/en-us/p/watch-the-longines-master-collection-chronograph-l2-673-4-78-3
- longines.com/de-de/p/watch-the-longines-master-collection-chronograph-l2-673-4-78-3
- ablogtowatch.com/longines-master-collection-l2-673-4-78-3-watch-review/
- monochrome-watches.com/2026-updated-longines-master-chronograph-moonphase-video-review-price/