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The Encyclopedia of Horology

Wristwatch · Automatic wristwatch

BALL Fireman II Automatic Watch NM2090C

Partially verified

The Ball Fireman II reference NM2090C is a Swiss-made automatic wristwatch featuring a stainless steel case reported by the source to measure 43.4 mm across and 12 mm thick. According to the seller, the watch is powered by an ETA 2824-2 automatic movement with 25 jewels, hack mechanism, quickset date, and a 40-hour power reserve. The black dial presents bold yellow Arabic numerals at 6, 9, and 12, baton hour markers, and a date window at 3 o'clock. Dial text indicates an automatic movement and 100M/330FT water resistance.

Oblique view of the Ball Fireman II wristwatch showing the black dial, yellow numerals, date window, and perforated strap
Oblique view of the Ball Fireman II wristwatch showing the black dial, yellow numerals, date window, and perforated strap — Second Hand Horology. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
secondhandhorology.com
Category
Wristwatch · Automatic wristwatch
Maker / attribution
BALL Watch Company SA
Reference
NM2090C
Catalogue / lot identifier
WA-2724
Source-reported date
Not established
Country
Switzerland
Source-reported serial
7902382

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

Dial and Visual Design

The watch features a black dial styled with prominent yellow Arabic numerals positioned at 6, 9, and 12 o'clock, complemented by luminous baton hour markers and triangular accents at the cardinal points. A date aperture is set at the 3 o'clock position displaying day 27, and the center sweep seconds hand incorporates an intertwined 'RR' monogram counterweight. The dial surface is marked 'BALL / OFFICIAL RR STANDARD / Since 1891' above the center arbor, with 'AUTOMATIC / 100M/330FT' inscribed across the lower portion.

While the seller text claims the dial is signed 'BALL Official RR Standard Trainmaster', the visible dial printing shows no reference to the Trainmaster line, instead matching standard Fireman II dial layouts. The watch is presented on a perforated black leather strap finished with contrasting yellow stitching and yellow-coated edges.

Evidence for this section
  • “Black dial featuring bold yellow Arabic numerals at the 6, 9, and 12 o'clock positions.”
  • “The dial is signed with "BALL Official RR Standard Trainmaster".”

Case Specifications and Reported Markings

The round case is constructed from stainless steel. Listing measurements note a diameter of 43.4 mm (with an alternate textual mention of 43.2 mm), a lug-to-lug span of 52 mm, a thickness of 12 mm, and a lug width of 21 mm.

According to the seller's transcription, the case back bears the engraved markings 'Ball Watch Co. Since 1891 Swiss Made Shock Resistance 7902382 NM2090C mb-microtec H3'. As no direct photographs of the reverse or case back were provided in the record, these case back inscriptions, reference designations, and the serial number remain vendor-reported.

Evidence for this section
  • “Case Back Signed: Ball Watch Co. Since 1891 Swiss Made Shock Resistance 7902382 NM2090C mb-microtec H3”
  • “Case Lug to Lug 52”

Mechanism and Source Limitations

The movement is stated by the merchant to be a Swiss-made Ball caliber based on an ETA 2824-2 automatic platform, featuring 25 jewels, a 40-hour power reserve, hacking seconds, and a quickset date mechanism. Because the movement is enclosed without internal movement imagery, its caliber identity, condition, and service history cannot be independently confirmed.

Additionally, the listing contains minor contradictions, including discrepant case diameter readings (43.2 mm versus 43.4 mm) and the erroneous 'Trainmaster' dial signature notation. The production date of this specific example is unrecorded in the merchant documentation.

Evidence for this section
  • “Ball movement caliber ETA 2824-2, 25 jewels, sweep second, date indicator (quickset), also featuring hack mechanism, Swiss made, 40 hours power reserve.”
  • “43.2mm round case, all in stainless steel”
  • “Case Diameter 43.4”

Open research questions

  • What is the exact internal movement grade and finishing of the ETA 2824-2 caliber fitted within this specific case?
  • Can direct examination of the case back confirm the reported serial number 7902382 and mb-microtec H3 markings?
  • What is the precise year of manufacture for reference NM2090C under serial number 7902382?

Source evidence

Recorded claims and source quotations for BALL Fireman II Automatic Watch NM2090C
FieldSource-reported valueSource quotation
ReferenceNM2090C“reference NM2090C”
Movement CaliberETA 2824-2“Ball movement caliber ETA 2824-2, 25 jewels”
Serial Number7902382“7902382 NM2090C mb-microtec H3”
Water Resistance100M/330FT“100M/330FT”
Case Thickness12 mm“Case Thickness 12”
Case Lug-to-Lug52 mm“Case Lug to Lug 52”
Lug Width21 mm“Lug Width 21”
Reported Power Reserve40 hours“40 hours power reserve”

Visible details

  • Black dial featuring bold yellow Arabic numerals at the 6, 9, and 12 o'clock positions.
  • Luminous baton hour markers and triangular markers at cardinal positions.
  • Date window positioned at 3 o'clock showing day 27.
  • Sweep seconds hand finished with an RR logo monogram counterweight.
  • Stainless steel case paired with a perforated black leather strap accented with yellow stitching and edges.

Research qualifications

  • Source description erroneously states the dial is signed 'Trainmaster', whereas the dial is visibly printed 'BALL / OFFICIAL RR STANDARD / Since 1891' and 'AUTOMATIC / 100M/330FT'.
  • Movement caliber ETA 2824-2 and serial number 7902382 are reported by the seller and not verified by visible internal or case back photos.

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

Consulted source

BALL Fireman II Automatic Watch NM2090C 100M/330FT – SECOND HAND HOROLOGY

Reviewed 2026-10-21 · Record 477824e106

Terms in this record

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

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