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Longines Master Collection Chrono Monopusher

Reference L2.960.4.93.2. A sheet to take with you: the numbers to check the watch against, what to look at, and what to ask. It does not authenticate anything and it does not tell you whether to buy.

Check the numbers

Measure or ask. A watch that does not match these is not necessarily wrong, but it is a question worth the answer.

Anything above marked not recorded is a gap in this catalog, not a property of the watch. Do not read a blank as a zero.

Before anything else

A current-production Longines at this price is not a meaningful counterfeit target, so the useful checks are about the single-pusher chronograph working correctly rather than about the watch being real.

What to look at

1. movement Single-pusher sequence
   Correct Successive presses give start, then stop, then reset, in that order and no other
   Red flag A press that resets a running chronograph, or a reset that leaves the hand short of zero
2. dial Chronograph seconds return to zero
   Correct The central chronograph hand lands exactly on the zero marker every reset
   Red flag A hand that consistently stops a fraction past or short of zero
3. dial Frosted blue barleycorn surface
   Correct An even pattern across the whole dial with consistent depth under angled light
   Red flag Pattern that fades or flattens in one area, which suggests moisture or a refinished dial
4. crown Manual winding feel
   Correct Even resistance building to a firm stop at full wind, with roughly 68 hours of reserve
   Red flag A crown that keeps turning with no stop, or a reserve well short of the rating

Known issues on this reference

• A monopusher runs start, stop and reset through one button in a fixed order. Pressing out of sequence does nothing on a healthy watch and forces nothing on a worn one, so a pusher that will reset from a running state is a fault.
• Column-wheel chronographs are the part of the watch that shows neglect first. A chronograph that has never been run in years often needs a service before it behaves.
• The pulsometer is printed on the dial and does nothing mechanically. It is a scale, not a complication, and it does not affect what the watch should cost.

Parts that are commonly replaced

• Straps are consumable and are replaced routinely.
• Chronograph hands are occasionally replaced after a reset fault; confirm they match in finish and length.

Ask the seller, whatever the watch

• When was it last serviced, by whom, and is there paperwork?
• Has the case ever been polished?
• Which parts are not original to it?
• Do you have the box, papers and the original bracelet or strap?
• Why are you selling it?
• Can I see it in daylight, and can I take a photo of the caseback?

What this sheet is standing on

The specifications above are sourced to longines.com, monochrome-watches.com. What else the catalog does not know.

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