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The Encyclopedia of Horology

Wristwatch · Chronograph

Omega Speedmaster Professional 'Hesalite Sandwich'

Partially verified

This Omega Speedmaster Professional, identified by reference 3572.50 and known as the 'Hesalite Sandwich', is a chronograph wristwatch featuring a stainless steel case and a black dial. It is equipped with the manually-wound caliber 1863 movement. The watch design maintains case proportions consistent with models from the mid-1960s. The dial, finished in matte black, features tritium luminous material on the markers and hands. This piece is categorized as a neo-vintage model. The source indicates that while the watch carries the visual and mechanical lineage of historical Speedmaster references, specific production details are not fully documented in the provided information.

Front view of the Omega Speedmaster Professional 3572.50 showing the black dial and stainless steel tachymeter bezel.
Front view of the Omega Speedmaster Professional 3572.50 showing the black dial and stainless steel tachymeter bezel. — Zamanito / Craft & Tailored. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
zamanito.com
Category
Wristwatch · Chronograph
Maker / attribution
Omega
Reference
3572.50
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
neo-vintage
Source-reported place
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

Case and Crystals

The Omega Speedmaster Professional reference 3572.50 utilizes a stainless steel case maintaining the established proportions seen in professional models dating back to the mid-1960s. The exterior is defined by a fixed black tachymeter bezel surrounding the dial.

The watch is distinguished by its 'Hesalite Sandwich' construction, which combines a traditional hesalite crystal on the front with a sapphire crystal case back. This specific combination allows for the visual warmth of the hesalite material while providing an unobstructed view of the movement through the exhibition back.

Evidence for this section
  • “تناسبات قاب این ساعت بدون تغییر نسبت به مدل‌های حرفه‌ای اصلی از اواسط دهه ۱۹۶۰ باقی مانده است.”
  • “این مدل دارای پشت شیشه‌ای از جنس یاقوت کبود برای نمایش موتور است، اما در قسمت جلو از کریستال هزالیت سنتی استفاده می‌کند.”

Dial and Movement

The watch features a matte black dial equipped with tritium-based luminous material on the indices and hands. This material is noted for its potential to develop patina over time.

The movement is the Omega caliber 1863, which is described as a direct evolution of the caliber 861 introduced in the late 1960s. The movement serves as the mechanical core for this chronograph, which is operated via standard pushers on the side of the case.

Evidence for this section
  • “صفحه مات مشکی این مدل از ماده شب‌نمای تریتیوم استفاده می‌کند”
  • “این ساعت از موتور کالیبر ۱۸۶۳ بهره می‌برد که در واقع فرزند مستقیم کالیبر ۸۶۱ است که در اواخر دهه ۱۹۶۰ معرفی شد.”

Provenance and Classification

The watch is classified as part of the neo-vintage category of Omega timepieces. The source notes that these items represent a combination of historical aesthetic roots and modern production performance, appealing to collectors interested in the Speedmaster lineage.

The source provides these details for informational purposes and does not offer independent verification of the watch's internal status, authenticity, or current operational state, noting that certain production details remain unverified.

Evidence for this section
  • “این قطعات از آخرین نسل مدل‌های نئو-وینتیج محسوب می‌شوند”
  • “وضعیت اصالت: نامشخص”
  • “این اطلاعات و سابقه به منبع نسبت داده می‌شوند و تأیید مستقل اصالت یا کارکرد توسط زمانیتو نیستند.”

Open research questions

  • What is the specific production date range for reference 3572.50?
  • Does the tritium dial indicate a specific production period within the neo-vintage series?

Source evidence

Recorded claims and source quotations for Omega Speedmaster Professional 'Hesalite Sandwich'
FieldSource-reported valueSource quotation
MakerOmega“برند: Omega”
ModelSpeedmaster Professional“مدل: Speedmaster Professional”
Reference3572.50“شماره مرجع: 3572.50”
Caliber1863“کالیبر: 1863”
Front CrystalHesalite“جنس کریستال جلو: هزالیت”
Case Back CrystalSapphire“جنس کریستال پشت: یاقوت کبود”
Luminous MaterialTritium“ماده شب‌نما: تریتیوم”

Visible details

  • Matte black dial with three sub-dials
  • Tachymeter scale on fixed outer bezel
  • Integrated steel link bracelet with folding clasp
  • Three-button chronograph configuration on the side of the case

Research qualifications

  • Authenticity status is reported as unknown by the source
  • Specific production dates and serial-related details are not provided

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

Consulted source

ساعت مچی Omega Speedmaster Professional 'Hesalite Sandwich'

Reviewed 2026-11-02 · Record 6fc34950a8

Terms in this record

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

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