Unitas 247
Mechanical
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Notes
open face calibre
option: Breguet hairspring
varying bridge shapes (cf. other calibres of the family)
attention: probably left handed ratchet-wheel screw
differences not known between 233, 237, 241, 247, 253, 257, 263, 269, 275, 281, 443, 453, 475, 481
likely just catalog designations for varying bridge shapes
Dimensions
| Width | 41 lignes (92.49 mm) |
|---|---|
| Height | 4.2 mm |
| Stem height | 0.5 mm |
| Hands (H × M × S) | 1.98 × 1.12 × 0.26 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 41 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | GR4365 |
|---|---|
| Height | 1.5 mm |
| Thickness | 0.21 mm |
| Length | 480 mm |
| Barrel diameter | 15.5 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Unitas |
| Year | — |
| Family | — |
| Clone of | — |
Related calibers
- Unitas 253
- Unitas 245
- Unitas 243
- Unitas 257
- Unitas 239
- Unitas 261
- Unitas 249
- Unitas 263
- Unitas 267
- Unitas 255
- Unitas 269
- Unitas 259
- Unitas 265
- Unitas 273
- Unitas 275
- Unitas 279
- Unitas 281
- Unitas 271
- Unitas 277
- Unitas 29
- Unitas 31
- Unitas 30
- Unitas 33
- Unitas 32
- Unitas 34
- Unitas 359
- Unitas 361
- Unitas 383
- Unitas 384
- Unitas 380
- Unitas 429
- Unitas 362
- Unitas 382
- Unitas 386
- Unitas 404
- Unitas 431
- Unitas 430
- Unitas 410
- Unitas 432
- Unitas 435
- Unitas 439
- Unitas 441
- Unitas 443
- Unitas 444
- Unitas 447
- Unitas 445
- Unitas 446
- Unitas 449
- Unitas 451
- Unitas 453
- Unitas 455
- Unitas 457
- Unitas 465
- Unitas 459
- Unitas 471
- Unitas 473
- Unitas 477
- Unitas 479
- Unitas 481
- Unitas 475
- Unitas 508
- Unitas 6431
- Unitas 6437
- Unitas 6445
- Unitas 237
- Unitas 233
- Unitas 234
- Unitas 231
- Unitas 235
- Unitas 241
- Unitas 251
Documents
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Updated 7 days ago · 0 revisions