Longines Sei-Tacche Reference 23788
Record status
Individual type · partial
Period
Circa 1948 or 1951
Maker / issuer
LonginesThis Longines Sei-Tacche wristwatch, reference 23788, is a vintage military-style timepiece housed in a 33 mm stainless steel case. The model designation Sei-Tacche, meaning six notches, refers to the unique case back construction designed for an enhanced seal, which required a specialized tool for removal.
The watch features a beige dial that has developed an aged patina, complete with black Arabic numerals filled with radium luminous material and a secondary red 24-hour scale. The time is indicated by blue steel hands. The case is described as being in excellent condition with long lugs and visible factory engravings on the case back, complemented by a matching engraving on the top left lug. The watch is currently fitted with a two-piece black canvas strap.
The source records indicate conflicting production dates, citing 1948 in the title and 1951 in the descriptive text.
Evidence at a glance
- Linked sources
- 1
- Photograph views
- 1
- Catalogue references
- 0
Counts describe this entry’s documentation, not authenticity, rarity or completeness. Photographs may show one specimen; check each caption and licence.
Technical characteristics
- Type
- Sei-Tacche military-style watch
- Maker
- Longines
- Strap
- Two-piece black canvas
- Reference
- 23788
- Case Diameter
- 33 mm
- Date Conflict
- 1948 or 1951
- Dial Features
- Arabic numerals with radium and red 24-hour scale
- Serial Number
- 83XXXXX
- Case Construction
- Six-notched back
- Maker / attribution
- Longines
Design
- Visible features
- • Six-notched 'Sei-Tacche' case back design • Blued steel hands • Red 24-hour inner track scale • Aged beige dial with radium luminous numerals
- Condition and Attribution
- According to the provided auction reporting, the case is in excellent condition, having preserved its original proportions. Although the surface exhibits light scratching and evidence of previous maintenance polishing, the geometry of the lugs remains intact. The watch is sold paired with a two-piece black canvas strap. The reported status is based on documentation provided by the seller. These details regarding the watch’s condition and provenance are not independently verified and are attributed strictly to the auction house's records.
- Case and Dial Construction
- The timepiece features a 33 mm stainless steel case characterized by its Sei-Tacche construction. This specific configuration features six distinct notches on the case back, a structural design element intended to provide a more secure seal against the elements. The case retains its original long lugs, which remain symmetrical despite minor surface wear and signs of prior polishing. The dial displays a warm beige hue consistent with age-related oxidation. It is populated with black Arabic numerals coated in radium luminous compound. Complementing the primary hour markers is a secondary red 24-hour scale, while the time is read through blued steel hands. Small, localized discolourations are present across the surface, confirming the aged status of the dial.
- Signatures and Identifiers
- Authenticity markers for the reference 23788 include specific factory engravings located on the case back. These markings remain distinct, testifying to the technical specification of the model. Furthermore, a corresponding engraving is found on the reverse side of the top-left lug. While identifying the specific production year remains subject to discrepancy within the documentation—citing both 1948 and 1951—the serial number 83XXXXX serves as the primary unique identifier for this particular movement/case unit.
Identification
- Reference
- 23788
- Serial number
- 83XXXXX
- Source note
- Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.
Catalogue references
No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.
Research required
- Research required: Conflicting production dates of 1948 and 1951 provided by source
- Research required: Attribution of the crown as original is only a possibility suggested by the source
- Research required: Authenticity claims are based on the auction description rather than independent verification