Serial Number & Production Reference
Omega Speedmaster Professional — CK 2915 through 145.022 (1957–1981)
A unified serial number and production timeline for the seven core Speedmaster Professional references, cross-referenced from five independent sources. This document plots production periods, serial number progression, caliber transitions, and documents verified outliers and unresolved anomalies. All serial numbers are movement serials — not case numbers. Ranges are approximate; Omega did not assign serials strictly sequentially and watches were not always sold in order of manufacture.
1. Sources & Methodology
Hartmann Roman Hartmann's Omega Speedmaster Serial Number Chart, Roman Hartmann's Omega Speedmaster Serial Number Chart, hosted by ChronoMaddox. The most comprehensive year-by-year Speedmaster-specific table available (1957–2000). Lists reference numbers, calibers, and serial prefixes per year. This is the primary source for year-to-serial mapping.
Maddox Chuck Maddox — Chuck Maddox — "Omega Serial Numbers by Year" (2001, revised 2004). Covers all Omega models, not Speedmaster-specific. Useful for general serial-to-year correlation but includes non-Speedmaster calibers in its ranges. Accuracy stated as ±1–2 years.
MWO Moonwatch Only — Moonwatch Only (Grégoire Rossier & Anthony Marquié). The definitive published reference book on the Speedmaster. Provides refined serial ranges and production details. Referenced through community citations and cross-checks with other sources.
OF OmegaForums — OmegaForums community data. Community-verified serial observations, identification threads, and debate on anomalous examples. Individual observations cited by thread ID where relevant.
How ranges were compiled: The serial waterfall uses Hartmann for year-by-year lower bounds (Speedmaster-specific) with upper bounds derived from Maddox and next-year Hartmann values. Where sources disagree, both are shown and the discrepancy flagged. Sub-reference serial breakdowns are compiled from available published sources including Speedmaster101 research (used with permission).
2. Verified Serial Distribution
Each row shows one reference. The shaded band marks the suggested movement serial range based on published sources (Hartmann, Moonwatch Only). Individual dots are verified data points from the SpeedyBase registry — auction results, Extracts of the Archives, and community submissions. Dot density reveals where most surviving examples cluster. Hover for details.
3. Production Periods by Reference
Each row shows one reference. Colored bars represent sub-references (e.g., 145.022-69, 145.022-71), placed horizontally by year of production. Bar widths show approximate production span, not volume. Hover for serial ranges. Dashed gold lines mark key space-program events. For 105.003-65, a faded extension shows the factory-stock release period (manufactured by ~1966 but sold until 1969).
4. Serial Number Waterfall
Serial number ranges mapped vertically (low at bottom, high at top) against year of production on the horizontal axis. Each colored block represents one reference's serial range for that year. Overlapping blocks show concurrent production. Gold triangles mark verified outlier serials; outlined triangles mark unconfirmed anomalies. Dashed boxes highlight documented serial gaps (23M and 29M ranges).
5. Caliber & Case Evolution
Three lanes showing the major technical transitions. The caliber lane shows the Cal. 321 (column-wheel, 17 jewels) era and the Cal. 861 (cam-actuated, 17 jewels, copper-plated) era, with the 1968–1969 overlap when both calibers were in concurrent production. The case lane shows the symmetric straight-lug design (38.6mm, CK 2915 through 105.003) and the asymmetric lyre-lug crown-guard design (42mm, 105.012 onward), with the 1963–1966 overlap period. Key changes are marked chronologically along the bottom lane.
6. Serial Reference Tables
Complete sub-reference serial ranges from all available sources. Where sources disagree, both figures are shown and discrepancies flagged. Production years derive from published sub-reference designations cross-checked against Hartmann's year-by-year chart.
| Sub-ref | Years | Serial Range | Hartmann | Documented | Notes |
|---|---|---|---|---|---|
| CK 2915-1 | 1957 | 1549 xxxx & 1599 xxxx | 14xxxxxxx | … | |
| CK 2915-2 | 1958 | ~15M–16M (1549/1599/1664) | 15–16xxxxxxx | … | |
| CK 2915-3 | 1959 | 1664 xxxx | 16xxxxxxx | … |
| Sub-ref | Years | Serial Range | Documented | Notes |
|---|---|---|---|---|
| CK 2998-1 | 1959–1960 | 1730 1xxx – 1776 1xxx | … | |
| CK 2998-2 | 1960 | 1730 2xxx – 1776 1xxx | … | Lollipop seconds hand |
| CK 2998-3 | 1960–1961 | 1776 1xxx – 1776 5xxx | … | |
| CK 2998-4 | 1961 | 1776 2xxx – 1841 9xxx | … | |
| CK 2998-5 | 1961–1962 | 1841 9xxx – 1894 5xxx | … | |
| CK 2998-6 | 1962 | 1894 6xxx | … | |
| CK 2998-61 | 1962 | 1894 6xxx – 1958 4xxx | … | |
| CK 2998-62 | 1962 | 1958 3xxx – 1983 4xxx | … |
| Sub-ref | Years | Serial Range | Documented | Notes |
|---|---|---|---|---|
| 105.002-62 | 1962–1963 | 1958 4xxx – 2052 5xxx | … | Two distinct serial groups (19M and 20M) |
| Sub-ref | Years | Serial Range | MWO | Documented | Notes |
|---|---|---|---|---|---|
| 105.003-63 | 1963–1964 | 2052 1xxx – 2052 6xxx | ~20,521k–20,526k | … | Very narrow range |
| 105.003-64 | 1964–1965 | 2052 7xxx – 2282 7xxx | ~20,527k–22,825k | … | |
| 105.003-65 | 1965–1966 | 2282 7xxx – 2544 6xxx | ~22,825k–26,554k | … | Factory stock to 1969 |
| Sub-ref | Years | Serial Range | Documented | Notes |
|---|---|---|---|---|
| 105.012-63 | 1963–1964 | 2052 0xxx – 2052 1xxx | … | Extremely rare |
| 105.012-64 | 1964–1966 | 2052 7xxx – 2282 5xxx | … | |
| 105.012-65 | 1965–1966 | 2282 5xxx – 2452 7xxx | … | |
| 105.012-66 | 1966–1968 | 2453 xxxx – 2544 xxxx | … | HF and CB case manufacturers |
| Sub-ref | Years | Serial Range | Hartmann | Documented | Notes |
|---|---|---|---|---|---|
| 145.012-67 | 1967–1968 | 2406 xxxx – 27xx xxxx | 24–26xxxxxxx | … | Includes Ultraman variant |
| 145.012-68 | 1968–1969 | ~27xx xxxx | … | Extremely rare |
| Sub-ref | Years | Serial Range | Hartmann | Documented | Notes |
|---|---|---|---|---|---|
| 145.022-68 | 1968–1969 | 2655 5xxx – 2771 xxxx | 26xxxxxxx | … | Transitional — Cal. 321 dial with 861 movement |
| 145.022-69 | 1969–1971 | 2842 0xxx – 3162 9xxx | 26–30xxxxxxx | … | Largest sub-ref. Straight Writing casebacks. |
| 145.022-71 | 1971–1974 | 31xx xxxx – 32xx xxxx | 30–32xxxxxxx | … | Step to flat dial transition |
| 145.022-74 | 1974–1976 | 31xx xxxx – 39xx xxxx | 32–34xxxxxxx | … | Wide observed range |
| 145.022-76 | 1976–1978 | 37xx xxxx – 39xx xxxx | 34–37xxxxxxx | … | |
| 145.022-78 | 1978–~1984 | 44xx xxxx – 45xx xxxx | 37–45xxxxxxx | … | Last date-stamped caseback |
7. Verified Outliers
Serial numbers that fall outside the expected range for their reference, backed by Omega Extracts of Archives, original purchase papers, or multi-source community confirmation.
8. Unconfirmed Anomalies
Community observations and cross-source inconsistencies awaiting definitive proof. These are documented phenomena, not errors — they represent the limits of available data.
9. Source Discrepancies
Explicit comparison of where sources disagree. These are not errors in the compilation — they reflect genuine disagreements between independent sources, each with different methodologies and sample sizes.