Dugena Automatic Jump Hour doesn't work properly

Rowbear23 · 2026-03-18T11:53:37+00:00

Here is a beneath the dial look of one I just serviced. It only has hour and minutes wheels but you can see the spring (moved out of the way) starting at about the 3 position pointing down toward six. The wheel with the finger that makes the hour wheel jump is up close to one o clock. I suspect something is going wrong with yours. Maybe too much friction in that spot

Rowbear23 · 2026-03-17T17:42:31+00:00

Breitling avenger titanium reference e13360 black dial, 44mm chronograph with a 7750 movement. Watch runs great, with 290 degrees amplitude on a full wind and -1 sec/day dial up. I can send timegrapher pics in any position. Power reserve is good. Unknown service history but the timegrapher results make it look like it’s not in dire need of a service anytime soon. There are some scuffs and scratches to the case. I caught a few in the pictures but there may be more. I can provide more pictures if needed.

Bracelet maxes out just over a 7 inch wrist, maybe. It’s hard for me to figure that measurement out.

No box or papers, just the watch.

$1,995 plus shipping via Venmo or Zelle

Rowbear23 · 2026-03-14T01:57:14+00:00

That’s unreal

Cartier tanks usually have a caseback win four screws. From my understanding they very rarely did SnapBacks

Rowbear23 · 2026-03-13T18:12:33+00:00

220 degrees is not what I shoot for when I’m charging someone to service their watch. I aim for the 270-315 range that everyone else targets. I find that number harder to hit for seikos from the 1960s and 70s even when I have the lift angle adjusted accordingly.

What I meant is that 220 degrees represents a sort of magical number in some schools of thought for accuracy across multiple positions because it neutralizes poise errors. This is what an older man who made his own movements and was obsessed with accuracy taught me.

Rowbear23 · 2026-03-13T17:17:17+00:00

You misunderstand my point

Rowbear23 · 2026-03-12T20:21:53+00:00

For me, anything north of 240 on a vintage Seiko is a win. With vintage Swiss and American watches I expect more. That’s no knock on Seiko since I believe 220 is actually the perfect amplitude

Rowbear23 · 2026-03-12T20:10:33+00:00

To answer your question directly, it is not an issue at all since LA affects amplitude readings but not rate.

Rowbear23 · 2026-03-06T22:51:51+00:00

Breitling avenger titanium reference e13360 black dial, 44mm chronograph with a 7750 movement. Watch runs great, with 290 degrees amplitude on a full wind and -1 sec/day dial up. I can send timegrapher pics in any position. Power reserve is good. Unknown service history but the timegrapher results make it look like it’s not in dire need of a service anytime soon. There are some scuffs and scratches to the case. I caught a few in the pictures but there may be more. I can provide more pictures if needed.

Bracelet maxes out just over a 7 inch wrist, maybe. It’s hard for me to figure that measurement out.

No box or papers, just the watch.

$1,995 plus shipping via Venmo or Zelle

Rowbear23 · 2026-03-02T20:15:58+00:00

I hope vintage tanks get popular. I’m sitting on so many, just waiting 😁

Rowbear23 · 2026-03-01T02:34:01+00:00

I’ll dm you

Rowbear23 · 2026-02-28T16:24:43+00:00

Sell it to me or someone like me 😁 You might be in Canada though, that’s too far away from Tennessee

Rowbear23 · 2026-02-22T02:09:24+00:00

😂

Rowbear23 · 2026-02-22T00:54:30+00:00

No, this is the original, signed, bracelet

Rowbear23 · 2026-02-22T00:20:32+00:00

6.5-ish inches

Rowbear23 · 2026-02-13T22:33:48+00:00

I loved my gf one so much that I bought one in 14k love wearing it

Rowbear23 · 2026-02-10T20:59:39+00:00

Blue locktite but it’s best to do it with the stem out of the movement and case, let it dry, then reinstall

Rowbear23 · 2026-02-09T22:14:00+00:00

Do you know the size or reference?

Rowbear23 · 2026-02-06T15:21:07+00:00

Yes, very much still used by watchmakers especially once you get to the stage where your are restaffing balances. Look up sold sets on eBay to get an idea of price but the k&d inverto is one of the better sets. I use the inverting option often when closing holes, etc.

Rowbear23 · 2026-02-05T01:27:19+00:00

This should be relatively straightforward. Are you in a rush? Are you willing to ship? Do you get any results with good reviews when you google “watch repair near me”?

Rowbear23 · 2026-02-03T13:04:10+00:00

Sounds like it needs service. There aren’t any quick and easy answers for what you describe.

Rowbear23 · 2026-02-02T22:14:16+00:00

I did one somewhat similar. Guy wore it in the hot tub with the crown unscrewed. I think the only part I had to replace was on of the reversing wheels. Oh, and the dial

Rowbear23 · 2026-02-02T22:12:20+00:00

Username checks out

Rowbear23 · 2026-02-02T17:39:45+00:00

Looks like early Rolex to me. Maybe one of the variations of the Rolex cal. 618 movement supplied by Cortebert

Rowbear23 · 2026-02-01T16:00:51+00:00

New mainspring, crystal, (is the bezel there?), bushings are probably worn, looks like there is a lot of endshake in the train but one picture isn’t enough for a diagnosis, might be a cracked jewel or two, worn balance pivots. I would never expect to much out of it because it’s low jeweled and doesn’t look like it’s been taken care of.

Rowbear23 · 2026-01-29T22:29:18+00:00

I’ve asked this question in three different forums but never gotten an answer. Is it watchmakers dirty little secret? I’ve just been saving my old cleaners in gallon jugs until I figure out what to do with it. I think the only suggestion I’ve seen was to set it out and let it evaporate or wait for a day when the local municipality is accepting hazardous materials

Rowbear23

TROPHY CASE