Harry Winston

Midnight Date Automatic 39mm

Name: Harry Winston Midnight Date Automatic 39mm MIDAHD39WW001
Brand: Harry Winston
SKU: MIDAHD39WW001

Ref. MIDAHD39WW001

2012–present · 39mm · caliber Harry Winston Cal. HW3000: in-house automatic, 28,800bph, 42h PR, 28j; used in Midnight Date; executed at the Geneva manufacture; exclusive to Harry Winston

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Movement tier: unclassified · caliber Harry Winston Cal. HW3000: in-house automatic, 28,800bph, 42h PR, 28j; used in Midnight Date; executed at the Geneva manufacture; exclusive to Harry Winston · 42h power reserve

Versatile size: fits most wrists (6–7.5 in / 15–19 cm)

39 mm case. The sweet spot for the broadest range of wrist sizes. Neither too dainty nor too bold.

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Authentication

The HW3000 is in-house and must be visible through the caseback; verify the HW logo crown and flush diamond settings on any diamond-marker variant.

Known issues in the market

Diamond hour markers must be set flush; raised or loose stones require stone-setting inspection.
The HW logo on the crown is a brand marker; absence means replacement.

Area	What to check	What is correct	Red flag
movement	Cal. HW3000 in-house architecture	HW3000 in-house movement visible through caseback; 42h power reserve	Non-HW3000 architecture; movement swap
crown	HW logo on crown	HW logo present on crown; correct Harry Winston brand marker	Unsigned or non-HW crown; replacement crown
dial	Diamond hour marker setting flush	Diamond hour markers set flush with dial surface; no raised or loose stones	Raised or loose diamond settings; stone-setting integrity issue

Common legitimate replacements

Crown; Harry Winston HW-signed only.
Crystal; sapphire standard.

Expert resources: Harry Winston authorized service; Geneva-based stone-setting specialists for diamond inspection.

Authentication guide

Last reviewed June 2026

The Harry Winston Midnight Date Automatic is a dress watch with a refined round case and a movement sourced through Harry Winston's LVMH-era production partnerships. Authentication risk centers on service history and condition rather than replicas.

Known reproduction risks

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LOW

Harry Winston watches are not heavily replicated. The brand is prestigious but lacks the extreme secondary-market premium that drives the highest-volume fake production.

Any replica "Harry Winston" will show font inconsistencies in the dial text under 10x magnification
Case finishing on replicas lacks the zone-specific polish and brush transitions of the original

The primary risk for Midnight Date purchases is undisclosed service or refinishing, not replica watches.

Dial variants by era

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Era	Description	Identifiers
2013 to present	Round case, approximately 42mm. The dial is clean with applied baton indices and a date window at 3 or 6. The "HARRY WINSTON" signature is applied in a specific typeface; the text weight and spacing are consistent across production.	"HARRY WINSTON" in a thin, elegant typeface at 12 "NEW YORK" underneath in a smaller weight Applied rose gold or white gold baton indices, not printed Date window with a clean chamfered frame

Service part flags

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Dial text

Original: The "HARRY WINSTON NEW YORK" text is applied with consistent weight and spacing. The font is proprietary and optically balanced.

Replacement tells

Any variation in letter spacing relative to reference photographs
Text that appears screen-printed rather than applied as individual characters
Font weight heavier or lighter than the original

Case

Original: The case is polished and brushed in specific zones. The HW case geometry has characteristic lugs and a mid-case profile; the proportions should match production photographs.

Replacement tells

Over-polished case with lost lug definition (common on watches that have been refinished)
Case that has been sized incorrectly for the bracelet or strap (gap at the lug attachment)

Case back markings

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2013 to present

"HARRY WINSTON" engraved on the caseback
Reference number and serial number stamped on the case band
Movement signature inside (varies by caliber generation)
Some references show a sapphire exhibition caseback with the movement visible

Movement tells

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Harry Winston has used movements from Glashütte Original and other partners through LVMH relationships; the movement inside should match the declared caliber for the reference and production year.
A movement that does not match the caseback generation or reference number indicates a swap.
Service marks visible on screw heads (under loupe) tell you the watch has been opened; this is not inherently a problem, but should be declared and accompanied by service documentation.
A running watch with amplitude below 250 degrees needs service; Harry Winston dress movements at full power reserve should run at 270 to 300 degrees amplitude.

Sources: Harry Winston official site; WatchProSite — Harry Winston.