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Buren 1322
Basic Information
| Name | Buren 1322 |
|---|---|
| Alternative Name | Bulova 12EBACD |
| Manufacturer | Buren Watch Company |
| Launch Year | 1962 |
| Caliber Family | Description 1280: only hour, minute 1281: date for flat dial 1282: date for domed dial 1320: second 1321: second, date for flat dial 1322: second, date for domed dial The assignment of flat/domed dial is based on few investigated watches. Possibly Buren didn't sign carefully, since the Flume K3 mentions it vice versa. Related calibers Buren 1280, Buren 1281, Buren 1282, Buren 1320, Buren 1321, Buren 1322 |
| Is COSC certified | No |
Timegrapher
Beat rate
19,800 bph
Frequency
2.75 Hz
Reference: healthy amplitude ≈ 270–315° fully wound (>200° at 24 h); beat error ideally < 0.5 ms.
Technical Details
| Lignes Dimensions | 12.5 ‴ |
|---|---|
| Dimensions | 28.5 mm |
| Height | 3.25 mm |
| Further Measures | Mounting Diameter (Dm): 28.15mm Rotor: 0.35mm Stem height (T): 1.8mm Mounting Height (F): 1.5mm |
| Power Reserve | 54 hours |
| Frequency | 19,800 vph |
| Jewels | 30 |
Complications and Specifications
| Shape | Round |
|---|---|
| Complications |
|
| Shock Protection | Incabloc |
| Regulator Type | Pinned Regulator (or Index Regulator) |
| Movement Type | Automatic |
| Rotor Type | Micro-Rotor |
| Escapement Type | Swiss Lever |
| Control Type | Balance Wheel |
| Winding Type | Automatic (Rotor-Driven) |
| Setting Type | Stem Set (Crown Pull) |
Additional Information
| Hand Sizes | 1.40 x 0.80 x 0.18mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: 1962- micro rotor, double jewel bearing if 21 or 30 jewels double excenter regulator for curb pins and stud carrier selfwinding gear with direction switching by a pinion floating between two huge jewels (Fig.6) indirectly driven minute and second allow a low profile (details cf. Buren 1320) since 1966/67 minor modifications of base plate and simplified date driver (Fig.5) Other data: balance staff: U3085 stem: W3060 mainspring / battery: 1.0 x 9.5 x 0.10mm balance staff ronda: 5151 (11,5) Mainspring: 1.000 x 9.500 x 0.095 x 340.000 mm Ranfft mentioned about this caliber: There are variants with this quantity of jewels 17, 21, 30 |
| Signature | 1-2) 1967: M7, SX, D, Bulova Watch Co, 12EBACD, Swiss, 30 Jewels; Incabloc (Bulova 12EBACD old, Buren 1322 alt) 3-5) 1967: M7, SX, D, Bulova Watch Co, 12EBACD, Swiss, 30 Jewels; Incabloc (Bulova 12EBACD new, Buren 1322 new) |
| Import Codes |
Compatible Parts
No parts linked yet for this caliber.
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | May 26, 2026, 4:43:58 AM |
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