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The Encyclopedia of Horology

Wristwatch · Mechanical wristwatch

H2O Hydra Makume Unitas 6497 Bronze Dial Watch

Partially verified

This timepiece is an H2O Hydra Makume wristwatch cataloged with a stainless steel case measuring 44 mm in diameter. The watch features a bronze-tone dial with central hours and minutes and a subsidiary seconds display at the 9 o'clock position. Farber Auctioneers reports the movement as an automatic Unitas 6497 in working order, accompanied by an original strap and buckle. The visible front view shows a dark case body, a brushed bezel with engraved linear markers and circular indentations, and a black leather strap with prominent contrast stitching.

Front view of the H2O Hydra Makume wristwatch showing dial, bezel, crown, and contrast-stitched strap
Front view of the H2O Hydra Makume wristwatch showing dial, bezel, crown, and contrast-stitched strap — Farber Auctioneers and Appraisers. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.bidsquare.com
Category
Wristwatch · Mechanical wristwatch
Maker / attribution
H2O
Reference
Hydra Makume
Catalogue / lot identifier
534
Source-reported date
Not established
Country
Not established

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Identity and Case Construction

The catalog records this timepiece under the designer name "H2O" and the reference or model designation "Hydra Makume". The case is documented as "Stainless Steel" with dimensions given as "Case 44mm, original band and buckle".

Direct visual inspection shows a dark-toned case body equipped with a fluted crown at 3 o'clock and a brushed bezel engraved with quarter-hour hashes and dotted indentations. The mounted black leather strap features white cross and ladder contrast stitching; the buckle itself is not visible in the front-facing photograph.

Evidence for this section
  • “Designer : H2O”
  • “Reference/Model: : Hydra Makume.”
  • “Metal : Stainless Steel”
  • “Measurements : Case 44mm, original band and buckle.”
  • “Dark-toned watch case body with fluted crown at 3 o'clock”
  • “Brushed bezel engraved with quarter-hour hashes and dotted indentations”
  • “Black leather strap secured with white cross and ladder contrast stitching”

Dial Configuration and Functions

The auctioneer lists the watch's functions as "Hours, Minutes, Seconds". In the accompanying photograph, the watch presents a metallic bronze-tone dial punctuated by circular hour dots and linear baton markers at the 12, 6, and 9 o'clock positions.

A subsidiary seconds display is located at the 9 o'clock position. Central hands indicate hours and minutes across the circular dial field.

Evidence for this section
  • “Functions : Hours, Minutes, Seconds.”
  • “Metallic bronze-tone dial with circular hour dots and baton markers at 12, 6, and 9 o'clock”
  • “Subsidiary seconds display positioned at the 9 o'clock location”

Movement Reporting and Examination Limits

The catalog listing describes the internal mechanism as "Automatic - Unitas 6497 - working order." This introduces an inconsistency, as Unitas 6497 movements are typically manual-wind calibers rather than automatics, and seller condition descriptions are opinions rather than established fact.

Because only a single overhead photograph of the dial side is provided, the movement is neither shown nor independently verified. Markings on the case back, interior caliber details, and buckle stamps are not recorded in this source.

Evidence for this section
  • “Movement : Automatic - Unitas 6497 - working order.”
  • “Condition : Excellent.”
  • “Any condition statement given is a courtesy to a bidder. It is an opinion and should not be treated as a statement of fact.”

Open research questions

  • Does the watch contain a standard manual-wind Unitas 6497, an automatic conversion, or an entirely different movement given the source's 'Automatic - Unitas 6497' description?
  • What specific material or finish accounts for the dark coloration of the case body relative to the stainless steel catalog description and 'Hydra Makume' model title?
  • What engravings, numbers, or maker marks appear on the case back and buckle?

Source evidence

Recorded claims and source quotations for H2O Hydra Makume Unitas 6497 Bronze Dial Watch
FieldSource-reported valueSource quotation
DesignerH2O“Designer : H2O”
Reference/ModelHydra Makume“Reference/Model: : Hydra Makume.”
MetalStainless Steel“Metal : Stainless Steel”
MovementAutomatic - Unitas 6497 - working order“Movement : Automatic - Unitas 6497 - working order.”
MeasurementsCase 44mm, original band and buckle“Measurements : Case 44mm, original band and buckle.”
FunctionsHours, Minutes, Seconds“Functions : Hours, Minutes, Seconds.”
Condition EvaluationReported as "Excellent" by the auction house, provided as an opinion rather than a verified fact“Condition : Excellent.”
Listing Lot IDLot 534“Lot 534”

Visible details

  • Metallic bronze-tone dial with circular hour dots and baton markers at 12, 6, and 9 o'clock
  • Subsidiary seconds display positioned at the 9 o'clock location
  • Brushed bezel engraved with quarter-hour hashes and dotted indentations
  • Dark-toned watch case body with fluted crown at 3 o'clock
  • Black leather strap secured with white cross and ladder contrast stitching

Research qualifications

  • Movement is reported as an automatic Unitas 6497 by the source, which typically designates a manual-wind caliber; movement is not visible in the provided photograph.
  • Case back, buckle, and movement cannot be independently verified from the single front-facing photograph.

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

H2O Hydra Makume Unitas 6497 Bronze Dial Watch for sale at auction on 17th December | Bidsquare

Reviewed 2026-10-21 · Record 0385e581cb

Terms in this record

Glossary explanations for terms named in this object’s record.

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