DuRoWe 75 (INT)
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| Durowe 75 (INT) |
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Description
The DuRoWe 75 is a modern, 5 1/2 ligne ladies' form watch movement, which
was released 1970, when DuRoWe was already working under the
Ebauches S.A.
roof - hence the additional name
INT.
The construction is classy - as usual on these movements, a shock protected (here in
inhouse Duro-Shock bearings) ring balance regulates the
pallet lever movement. The balance beats with contemporary fast 21600 A/h.
Its hairspring is connected to a moveable hairspring stud and can be regulated in its
effective length at the hairspring key only.
A little speciality is, that the bearing of the minute gear on the dial side contains
a synthetic ruby and is not made of metal, as usual.
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| empty main plate |
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On the view of the empty main plate, you can see, how escapement wheel and
fourth wheel overlap and the escapement wheel runs
below the higher placed
fourth wheel bearing. This space-reducing construction can be found on almost all
tiny ladies' watch form movements.
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| side view |
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On the side view, you see the higher placed bearing of the fourth wheel and the
overlapping escapement wheel.
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| dial side view |
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The dial side looks familiar, too - of course, this movement also uses a
yoke winding system.
Technical data
| Manufacturer | DuRoWe |
| Caliber | 75 (INT) |
| Number of jewels | 17 |
| Escapement | Anchor with pallets |
| Balance | Nickel |
| Shock protection(s) | Duro-Swing |
| Balance cock direction | counterclockwise |
| Hairspring stud | moveable |
| Regulator type | Hairspring key |
| Movement construction | Fork
Escapement wheel, Fourth wheel, Third wheel, Center wheel
Mainspring barrel |
| Construction type | solid construction |
| Bridge shape | Jetski, 4 gears |
| Winding mechanism | yoke |
| Setting lever spring | 2 holes |
| Functions | Hour, minute |
| Beats per hour | 21600 |
| Size | 51/2''' (measured: 12,9 x 15,0 mm) |
| Production time | 1970 - |
| Image in Flume Werksucher | K3 77 |
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| Factsheet |
Timegrapher output
The specimen shown here came completely gummed into the studio, was disassembled completely,
cleaned, lubricated and re-assembled afterwards.
On the timegrapher, it shows good results, and if there were not the two runaways on
the positions "3 up" and "dial down", it would even run within the chronometer specs.
For a form movement of that small size, that's a great performance!
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| dial down |
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| dial up |
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| 12 up |
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| 3 up |
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| 6 up |
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| 9 up |
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