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The Encyclopedia of Horology

Wristwatch · Triple calendar moon phase wristwatch

Citizen Campanola Tenmanboshi Quartz Wristwatch

Partially verified

This Citizen Campanola Tenmanboshi is a men's wristwatch cased in stainless steel and fitted to a black leather strap. The layered dial configuration incorporates a dark outer ring bearing white Roman numerals, surrounding inner track rings, sector indicators for the day of the week and month, a concentric date subdial at 12 o'clock, and a lower moon phase aperture set against a gold-flecked black background. The auction house reports a quartz movement, an approximate case width of 44 mm, a 21 mm lug width, and reference BU0020-03A/8730-T018033.

Dial and case front of the Citizen Campanola Tenmanboshi wristwatch
Dial and case front of the Citizen Campanola Tenmanboshi wristwatch — Bidhaus. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.liveauctioneers.com
Category
Wristwatch · Triple calendar moon phase wristwatch
Maker / attribution
CITIZEN
Reference
BU0020-03A/8730-T018033
Catalogue / lot identifier
0134H
Source-reported date
Not established
Country
Japan
Source-reported serial
161000***

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 Reference Details

Catalogued under the model name Campanola Tenmanboshi by Citizen, this wristwatch is designated with Japan as its country of origin. The auction specifications identify reference number BU0020-03A/8730-T018033, while the visible text printed at the bottom edge of the dial at the 6 o'clock position reads "JAPAN 8730-T027461 YI".

The auction entry records a partially masked serial number, "161000***". The piece is listed as pre-owned and offered with "None (watch only)" for accessories.

Evidence for this section
  • “Model Name: Campanola Tenmanboshi”
  • “Reference Number: BU0020-03A/8730-T018033”
  • “Dial edge at 6 o'clock inscribed 'JAPAN 8730-T027461 YI'”
  • “Serial Number: 161000***”
  • “Accessories: None (watch only)”

Case Construction and Belt Dimensions

The watch features a stainless steel case fitted with a leather belt. According to the seller's reported measurements, the case width is approximately 44 mm, the lug width is 21 mm, and the belt size measures approximately 19.5 cm in total wrist circumference including the case.

The seller's condition assessment notes several light scratches and small dents across the case and bezel, light scratches and small dents on the buckle, and light damage and deterioration overall on the leather band.

Evidence for this section
  • “Case Material: Stainless steel”
  • “Case Size (W): Approx. 44mm”
  • “Lug Width: 21mm”
  • “Belt Size: Approx. 19.5cm (total wrist circumference including case)”
  • “Case Condition: B (several light scratches, small dents overall)”
  • “Belt Condition: B+ (light damage, deterioration overall)”

Dial Display and Complications

Described by the auctioneer as having a silver and black dial, the face displays a complex multi-part layout. Observations confirm an outer dark chapter ring marked with large white Roman numerals surrounding central openworked gold-tone hour and minute hands. Curved aperture displays at 9 o'clock and 3 o'clock indicate the day of the week and month, respectively.

An upper circular subdial positioned at 12 o'clock is calibrated for the date of the month with a blued indicator hand, while a lower subdial at 6 o'clock features a gold-flecked black surface, Campanola branding, and a circular moon phase aperture. The seller reports light scratches on the glass at the 11 o'clock position and slight stains in places on the dial.

Evidence for this section
  • “Dial Color: Silver/Black”
  • “Dark chapter ring marked with large white Roman numerals”
  • “Central openworked gold-tone hour and minute hands with a central seconds hand”
  • “Curved aperture displays for day of the week at 9 o'clock and month at 3 o'clock”
  • “Upper circular subdial calibrated for date of the month with blued indicator hand”
  • “Lower subdial with gold-flecked black surface, Campanola branding, and circular moon phase aperture at 6 o'clock”
  • “Glass Condition: Light scratches at 11 o'clock position”
  • “Dial Condition: Slight stains in places”

Open research questions

  • What explains the discrepancy between the catalogued reference 'BU0020-03A/8730-T018033' and the dial code 'JAPAN 8730-T027461 YI' at the 6 o'clock edge?
  • What is the complete unmasked serial number on the case back, and what production timeframe does it denote for this model?
  • What specific quartz movement caliber is fitted within the case?

Source evidence

Recorded claims and source quotations for Citizen Campanola Tenmanboshi Quartz Wristwatch
FieldSource-reported valueSource quotation
Model NameCampanola Tenmanboshi“Model Name: Campanola Tenmanboshi”
Reference NumberBU0020-03A/8730-T018033“Reference Number: BU0020-03A/8730-T018033”
Movement TypeQuartz“Movement Type: Quartz”
Case SizeApprox. 44mm“Case Size (W): Approx. 44mm”
Functions/FeaturesTriple calendar, moon phase“Functions/Features: Triple calendar, moon phase”
Serial Number161000***“Serial Number: 161000***”
Lug Width21mm“Lug Width: 21mm”
Belt SizeApprox. 19.5cm“Belt Size: Approx. 19.5cm (total wrist circumference including case)”
Belt MaterialLeather“Belt Material: Leather”
Included AccessoriesNone (watch only)“Accessories: None (watch only)”

Visible details

  • Dark chapter ring marked with large white Roman numerals
  • Curved aperture displays for day of the week at 9 o'clock and month at 3 o'clock
  • Upper circular subdial calibrated for date of the month with blued indicator hand
  • Lower subdial with gold-flecked black surface, Campanola branding, and circular moon phase aperture at 6 o'clock
  • Central openworked gold-tone hour and minute hands with a central seconds hand
  • Dial edge at 6 o'clock inscribed 'JAPAN 8730-T027461 YI'

Research qualifications

  • The source masks part of the serial number as '161000***'
  • The dial code at 6 o'clock reads '8730-T027461', whereas the auction listing lists the reference as 'BU0020-03A/8730-T018033'
  • Movement caliber and internal condition are unverified as no interior or case back photographs are provided

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

Consulted source

Citizen Campanola Tenmanboshi Quartz Men's Wristwatch Triple Calendar Moon Phase Auction

Reviewed 2026-10-21 · Record 2e93afb355

Terms in this record

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

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