Omega Calibre 1450 Quartz Movement
Omega calibre 1450 is a compact analogue quartz movement documented from 1983 and designed for small watch cases. Omega identifies it as R 13 Q 10P: a 10 jewel movement measuring 13.00 × 15.15 mm, regulated by a 32,768 Hz quartz resonator. Omega’s historical calibre nomenclature records the 1450 under the name Ecureuil, describes it as the 5½ ligne crown version, and identifies it as the successor to calibre 1387.
The specified cell is a 1.55 V low drain silver oxide battery, approximately 5.8 mm × 1.65 mm. Omega’s workshop characteristics list Renata 317 and a nominal battery life of 24 months. Modern 317 and SR516SW cells are the correct battery family for calibre 1450.
Omega 1450 technical specifications
| Manufacturer | Omega |
| Calibre | 1450 |
| Omega designation | R 13 Q 10P |
| Movement type | Analogue quartz |
| Documented year | 1983 |
| Jewels | 10 |
| Movement dimensions | 13.00 × 15.15 mm |
| Movement height | 1.98 mm |
| Total height | 2.10 / 2.46 mm, dependent on battery height in Omega historical nomenclature |
| Quartz frequency | 32,768 Hz |
| Battery | 317 / SR516SW |
| Omega battery reference | 1447001 |
| Battery voltage | 1.55 V |
| Omega specified battery life | 24 months |
| Accuracy specification | −9 / +15 seconds per month |
| Motor impulses | 3 per minute |
| Coil resistance | 2.25–2.45 kΩ |
| Consumption | 0.40 µA |
| Lower working voltage | 1.30 V |
| Rate regulation | Trimmer |
| Calendar | None |
| Historical name | Ecureuil |
| Size class | 5½ ligne, crown version |
| Predecessor | Omega calibre 1387 |
| Historical production record | 614,135 pieces, according to Omega calibre nomenclature records |
Battery reference and equivalents
The 1450 should be referenced by its battery family, not by physical resemblance to another button cell. The modern standard is 317 / SR516SW.
| Omega service reference | 1447001 |
| Renata / Energizer | 317 |
| IEC / Japanese designation | SR516SW / SR62 |
| Varta | V317 |
| Duracell | D317 |
| Seiko | SB AR |
| Citizen | 280 58 |
| Bulova | 616 |
| Timex | CA |
Does Omega 1450 have an ETA equivalent?
No direct ETA equivalent is confirmed in Omega’s calibre documentation. This is an important distinction. Omega’s historical nomenclature explicitly identifies ETA bases for numerous neighbouring quartz calibres, yet calibre 1450 is listed simply as the Omega Ecureuil movement rather than with an ETA calibre number.
For identification, parts sourcing and technical reference, it should therefore be treated as Omega calibre 1450, not automatically substituted with an ETA number. Secondary horological references have also described the 1450 as one of Omega’s final internally developed analogue quartz calibres, but the most defensible statement is that Omega documentation does not assign it a direct ETA equivalent.
Omega 1450 compared with calibre 1387
The 1450 is historically significant because Omega records it as the successor to the 1387. The two share the same basic footprint, but they are not interchangeable references and they do not use the same battery.
| Specification | Omega 1387 | Omega 1450 |
|---|---|---|
| Year | 1981 | 1983 |
| Dimensions | 13.00 × 15.15 mm | 13.00 × 15.15 mm |
| Jewels | 3 | 10 |
| Battery | 321 / SR616SW | 317 / SR516SW |
| Setting system | Electronic correction via recessed push button | Crown version |
| Historical relationship | Predecessor | Successor to 1387 |
Read the Gilded Hour Omega 1387 movement reference →
Design and operation
Calibre 1450 was engineered around an unusually compact rectangular footprint. Its 10 jewel construction, thin movement architecture and crown operated setting system made it suited to smaller jewellery scale Omega watches where case proportion mattered as much as timekeeping. The parts sheet identifies the calibre marking on the electronic module, an important point when confirming a movement directly rather than inferring it from the watch case alone.
Accuracy and electrical characteristics
Omega’s workshop specification gives a monthly accuracy tolerance of −9 to +15 seconds. Current consumption is listed at 0.40 µA, coil resistance at 2.25 to 2.45 kΩ, and the lower working voltage at 1.30 V. Rate adjustment is by trimmer. These figures are useful diagnostic reference points when a 1450 is being assessed by a qualified watchmaker.
Selected Omega 1450 service parts
Omega’s parts documentation identifies a number of calibre specific components. Selected references include:
| Main plate | 1450.9000 |
| Train wheel bridge | 1450.9005 |
| Minute train bridge | 1450.9009 |
| Battery insulator | 1450.9032 |
| Battery limiting spring | 1450.9059 |
| Stator | 1450.9402 |
| Rotor | 1450.9415 |
| Electronic module | 1450.9600 |
History and identification
Omega’s historical nomenclature records calibre 1450 as the Ecureuil, a 5½ ligne crown operated quartz movement introduced after the push button corrected calibre 1387. The same historical record gives a production figure of 614,135 pieces. Because vintage Omega cases can share broad external styling while carrying different movements, a case reference alone should not be used to assign calibre 1450. The calibre should be confirmed from the movement itself or from model specific Omega documentation.
Omega 1450 FAQ
What battery does Omega calibre 1450 use?
The correct specified battery is 317 / SR516SW, 1.55 V low drain silver oxide. Omega’s service reference is 1447001.
Is a 317 the same as SR516SW?
Yes. 317 is the common commercial designation and SR516SW is the standard silver oxide size designation for the same battery family.
What is the ETA equivalent of Omega 1450?
No direct ETA equivalent is confirmed in Omega calibre documentation. Omega lists ETA base numbers for many other quartz calibres but records 1450 as the Ecureuil without an ETA designation.
How is Omega 1450 different from 1387?
Omega records 1450 as the successor to 1387. Both share a 13.00 × 15.15 mm footprint, but 1450 has 10 jewels, uses a crown setting system and takes a 317 / SR516SW battery. The 1387 has 3 jewels, electronic push button correction and takes a 321 / SR616SW.
How many jewels does Omega 1450 have?
Omega identifies the 1450 as a 10 jewel movement.
What is the specified accuracy?
Omega’s workshop technical characteristics give a tolerance of −9 to +15 seconds per month.
How long should the battery last?
Omega’s service specification lists approximately 24 months for the specified 317 cell under normal operating conditions.
Where is the calibre identified?
Omega’s 1450 parts sheet notes that the movement number is located on the electronic module.
Technical documents
Omega quartz movements workshop technical characteristics
Omega calibre 1450 parts sheet, archived copy
Battery, electrical and performance data on this page are taken from Omega workshop technical characteristics and Omega calibre parts documentation where available. Modern battery equivalents are cross checked against current manufacturer reference tables. Historical production and nomenclature details are identified separately from workshop specifications. Service data is provided for reference and should be used by a qualified watchmaker.