Seiko 6309-7290, a diving watch

[nico]

I acquired this watch few months ago...

Started to clean the outer parts, the hands, the bezel... And change the glass.

 

The crown and the stem on a spring:

Then I wore it for a while and decided to give it a service this Christmas holidays.

Graphite grease everywhere...

As I have not graphite grease yet, I just used normal barrel grease. What should be the impact ?

 

Final view :

 

Still working on a little software to calculate the different deltas. I commented the data in case you find an interest. Based on informations found here https://calibercorner.com/positions/ and in a video from the "Watch Repair Tutorials"'s youtube channel (did'nt found the right video yet )

date: 2024-12-28 08:53:28.996870
measures: # User input
- amp: 171 # °
  beat: 0.2 # beat error in ms
  pos: DU # Dial Up
  rate: 63 # d/s
- amp: 165
  beat: 0.3
  pos: DD # Dial Down
  rate: 60
- amp: 165
  beat: 3.0
  pos: CL # Crown Left ; Vertical, 12 Up
  rate: 3
- amp: 163
  beat: 2.5
  pos: CD # Crown Down
  rate: 56
- amp: 144
  beat: 0.2
  pos: CU # Crown Up
  rate: 36
obs: 'before service'

### Calculated stats:
Delta rate:  60s/d
Dial delta rate:  3s/d
Vertical delta rate:  3s/d
Delta Amplitude:  27°
Mean rate:  43.6s/d
Mean beat:  1.24ms

----------------------------------------------
date: 2025-01-04 19:53:53.215268
measures:
- amp: 235
  beat: 0.4
  pos: DU
  rate: 1
- amp: 233
  beat: 0.4
  pos: DD
  rate: 2
- amp: 198
  beat: 0.3
  pos: CL
  rate: 17
- amp: 191
  beat: 0.1
  pos: CD
  rate: 2
- amp: 192
  beat: 0.8
  pos: CU
  rate: 5
obs: 'after service'

### Calculated stats:
Delta rate:  16s/d
Dial delta rate:  1s/d
Vertical delta rate:  1s/d
Delta Amplitude:  4°
Mean rate:  5.4s/d
Mean beat:  0.4ms

I think I can get best results, but I don't know what I can expect with this movement . And you ?

[AndyGSi]

Figures are OK for DU & DD if you've got the correct lift angle and depending what you've done with the spring

I would have expected better in the other positions though.

[nico]

Thanks for your feedback. I know I have oiled a bit too much a balance pivot's jewel, maybe it'll help if I start again this one.

I forgot to say that this movement is well documented, it was a pleasure to work on it, especially following the official reassembly procedure and the oiling chart.

It is my tool watch since months now !

(Lift angle =  54.5°, VPH = 21600 )

2 hours ago, AndyGSi said:

Figures are OK for DU & DD if you've got the correct lift angle and depending what you've done with the spring

I would have expected better in the other positions though.

For the main spring I opened the barrel, cleaned all, and used oil for hand winding spring. I winded it with a modified Chinese winder set (O enlarged some holes to use more axes on winder barrels). But I'm not sure I understand your point, I'm sorry.

[AndyGSi]

13 minutes ago, nico said:

But I'm not sure I understand your point, I'm sorry.

If you're still using the old spring then 230+ are good readings for DU & DD.

I'd have expected 240 to 250 if you were using a new one.

17 minutes ago, nico said:

and used oil for hand winding spring.

Not sure what you mean by this as it should be a grease in the barrel like Moebius 8217

[nico]

Yes I meant grease for barrel 8200-like (Novostar 17311) instead of 8217.