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The Encyclopedia of Horology

Movement · Chronograph movement

Eska Watch Movement and Case

Partially verified

This lot features a vintage Eska watch movement catalogued alongside a stainless steel case measuring 34 mm in diameter. The photograph depicts a manual-wind chronograph movement fitted with a balance wheel, regulation index, and an attached winding stem with a fluted crown. Visible bridge markings include 'UNADJUSTED', 'SWISS', '17 SEVENTEEN JEWELS', and 'ESKA WATCH CO'. The balance cock is stamped with the US import code 'SXK' along with 'A/R' and 'F/S' regulator markings. The auction listing categorises the item under loose watch parts.

Top plate view of the vintage Eska 17-jewel chronograph movement with attached stem and crown
Top plate view of the vintage Eska 17-jewel chronograph movement with attached stem and crown — Collectible Auctions LLC. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.invaluable.com
Category
Movement · Chronograph movement
Maker / attribution
Eska
Reference
Not recorded
Catalogue / lot identifier
12
Source-reported date
Not established
Country
Switzerland

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

Object Identity and Cataloguing

The auction lot is catalogued under the title 'Loose Vintage Eska Watch Case and Movement' and described as 'Loose Stainless Steel Vintage Eska Watch Case and Movement.' The listing further notes 'Loose watch parts.' and indicates '34mm diameter.' for the dimensions.

No reference number, serial number, or specific movement calibre is stated in the listing description. While both a case and movement are listed, the provided visual documentation captures only an uncased movement assembly.

Evidence for this section
  • “Lot 12 : Loose Vintage Eska Watch Case and Movement”
  • “Loose Stainless Steel Vintage Eska Watch Case and Movement.”
  • “34mm diameter.”
  • “Loose watch parts.”

Visible Mechanism and Bridge Markings

The available photograph shows the movement plate with chronograph levers, column-less cam operating components, and gear train wheels. A winding stem and fluted crown are attached to the assembly.

Markings stamped on the bridge include 'UNADJUSTED', 'SWISS', '17 SEVENTEEN JEWELS', and 'ESKA WATCH CO'. The balance cock is engraved with 'A/R' and 'F/S' regulator markings, as well as the import code 'SXK'.

Evidence for this section
  • “Bridge is marked 'UNADJUSTED', 'SWISS', '17 SEVENTEEN JEWELS', and 'ESKA WATCH CO'.”
  • “Balance cock is engraved with regulator markings 'A/R' and 'F/S', as well as the import code 'SXK'.”
  • “Movement is fitted with a winding stem and fluted crown.”
  • “Chronograph levers, column-less cam operating components, and gear train wheels are visible on the plate.”

Documentation and Visual Limitations

The catalogued stainless steel case measuring 34 mm in diameter is described in the text but is not depicted in the provided photograph.

The visual record is limited to a top plate view of the movement. The dial side, hands, dial condition (if present), and operational running order are not documented in this source record.

Evidence for this section
  • “Loose Stainless Steel Vintage Eska Watch Case and Movement.”
  • “34mm diameter.”

Open research questions

  • What specific base chronograph calibre (e.g. Landeron or Venus ebauche) corresponds to the plate and cam configuration of this Eska-branded movement?
  • Does the 34 mm stainless steel case mentioned in the lot description survive with matching markings or case reference numbers?
  • Was an original dial or hands included in the lot, or was it sold strictly as loose uncased components?

Source evidence

Recorded claims and source quotations for Eska Watch Movement and Case
FieldSource-reported valueSource quotation
Maker / BrandEska“Loose Vintage Eska Watch Case and Movement”
MaterialStainless Steel“Loose Stainless Steel Vintage Eska Watch Case and Movement.”
Diameter34mm“34mm diameter.”
Lot Number12“Lot 12 : Loose Vintage Eska Watch Case and Movement”
Auctioneer CategorisationLoose watch parts“Loose watch parts.”
Lot TitleLoose Vintage Eska Watch Case and Movement“Lot 12 : Loose Vintage Eska Watch Case and Movement”

Visible details

  • Bridge is marked 'UNADJUSTED', 'SWISS', '17 SEVENTEEN JEWELS', and 'ESKA WATCH CO'.
  • Balance cock is engraved with regulator markings 'A/R' and 'F/S', as well as the import code 'SXK'.
  • Movement is fitted with a winding stem and fluted crown.
  • Chronograph levers, column-less cam operating components, and gear train wheels are visible on the plate.

Research qualifications

  • The accompanying stainless steel watch case mentioned in the auction description is not visible in this photograph.
  • Specific calibre designation is not stated in the listing.
  • Dial side and operational condition are not documented.

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

Consulted source

Sold at Auction: Loose Vintage Eska Watch Case and Movement

Reviewed 2026-10-21 · Record cb80ccb77b

Terms in this record

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