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AS 1087
Basic Information
| Name | AS 1087 |
|---|---|
| Manufacturer | AS |
| Launch Year | 1945 |
| Caliber Family | Description H= 4.15mm: 1052, 1054, 1067, 1068, 1087, 1148, 1369, 1379: 16" 1063, 1064, 1071, 1072, 1080, 1121: 17" 1075, 1076: 17.5" , negative stem mechanism H= 3.5mm: 1058, 1059, 1069, 1070: 16" 1065, 1066, 1073, 1074: 17" Related calibers AS 1052, AS 1054, AS 1058, AS 1059, AS 1063, AS 1064, AS 1065, AS 1066, AS 1067, AS 1068, AS 1069, AS 1070, AS 1071, AS 1072, AS 1073, AS 1074, AS 1075, AS 1076, AS 1080, AS 1087, AS 1121, AS 1148, AS 1369, AS 1379 |
| Is COSC certified | No |
Timegrapher
Beat rate
18,000 bph
Frequency
2.5 Hz
Reference: healthy amplitude ≈ 270–315° fully wound (>200° at 24 h); beat error ideally < 0.5 ms.
Technical Details
| Lignes Dimensions | 16 ‴ |
|---|---|
| Dimensions | 36.1 mm |
| Height | 4.15 mm |
| Further Measures | Mounting Diameter (Dm): 35.55mm Stem height (T): 2.0mm Mounting Height (F): 0.6mm |
| Power Reserve | 32 hours |
| Frequency | 18,000 vph |
| Jewels | 15 |
Complications and Specifications
| Shape | Round |
|---|---|
| Complications |
|
| Regulator Type | Pinned Regulator (or Index Regulator) |
| Movement Type | Manual |
| Escapement Type | Swiss Lever |
| Control Type | Balance Wheel |
| Winding Type | Stem Winding (Crown) |
| Setting Type | Stem Set (Crown Pull) |
Additional Information
| Hand Sizes | 1.80 x 1.00 / 0.28mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: open face calibre except varying bridge layouts, crown-wheel bearings, and clicks no differences known between 1052, 1054, 1067, 1068, 1087, 1148, 1369, 1379 Other data: balance staff: U931 stem: W1429 mainspring / battery: Zf3205, 1.70 x 14.0 x 0.16 x 430mm balance staff ronda: 230 (16) stem ronda: 354 (16) Mainspring: 1.700 x 14.000 x 0.160 x 460.000 mm |
| Signature | ca. 1945: Arcadia ***, Swiss Made, 15 Jewels - AS (AS 1069, H= 3.5mm) |
Compatible Parts
No parts linked yet for this caliber.
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | Apr 23, 2025, 11:30:56 PM |
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