Redpat wrote: ↑Mon Sep 23, 2024 10:46 pm Hopefully I won't jinx my own BMF but I've had mine a few months and it's a fantastic watch. The manual wind was a little stiff at first but it freed up after a few weeks. The watch runs perfectly and tends to be my go to for any activities outdoors or where It may get anywhere near strenuous. . I have mine on the camel strap and it's a wear and forget scenario.
I hope your renewed model is all mine has been so far.
Pat

I'd just make the point that any make of mechanical watch can have issues. I have an Omega product - not one which I've sold or am currently offering for sale - which developed a winding stiffness which I could detect. That watch is not covered by a warranty but it's gone away to be made wonderful again.

And I have several SH21 movements which, touch wood, have all behaved like good eggs! You've inspired me to wear one tomorrow: thanks for that.

Bahnstormer_vRS wrote: ↑Tue Nov 12, 2024 9:43 am @Chris GB - how's it going?

Guy

Frustratingly! At full power, it's just about limping along at the COSC low limit of -4spd. Go below 4 days reserve and it's running slower. Runs slow in all orientations. On the plus side, the auto winding is working excellently, more efficient than it's predecessor.

So what I now have is a 1 day power reserve just about COSC watch and the remaining 4 days it is just an annoyingly slow running watch.

I still maintain that no test was done prior to sending, and even if it were, it seems silly to send something out that is going to be disappointing for the customer. I'm still in the process of deciding what to do. I don't suppose I can return it as technically, it just about meets spec. As I said, frustrating.

Bahnstormer_vRS wrote: ↑Sun Dec 01, 2024 3:45 pm

Chris GB wrote: ↑Tue Nov 12, 2024 10:34 am . . . . .

I still maintain that no test was done prior to sending, . . . . .

I'm confident that CW will have tested it, although I have no evidence one way or the other.

Perhaps you should ask CW for details and confirmation. .


Two weeks on, how's things going?

Keeping or being returned?

Guy

Sent from my Galaxy S23 Ultra using Tapatalk

Apparently, it was tested prior to despatch, so the testing process would appear to be inadequate. It's a strange coincidence that the new movement has a very similar error profile to the one that went in for replacement. With a bit of wearing, it's settled into a -5spd when kept in the top 10% of it's power reserve, slower still at lower power reserve. I've got a return bag sitting here and I'm trying to decide what to do.

Matt has said that the watch can go to the head of the workshop for investigation / regulation. I could be happy with this if they can get it right. However, I can't shake the thought that the COSC cert shows a very different performance to what I observe, which makes me worry that something is not right in there. The emotive side of my brain is pushing me towards letting them have one last, and it will be last, crack at getting it right.

The objective side of my brain looks at my experiences and is telling me that they are a company in crisis, as far as their workshop goes. I shouldn't be entertaining letting them have yet another chance at a half baked return cycle and I'd be better off just returning it for a refund and move on.

Decisions, decisions!

I vote return and be done with it. Let’s say it’s “fixed” this time. Will be run well in a year? It seems that they can’t get it right and this is the sort of stuff that led me to sell every single CW I had - down to a nice fat zero now. My trust is pretty much gone as far as their QC goes.

Jkpa wrote: ↑Sun Dec 01, 2024 6:08 pm I vote return and be done with it. Let’s say it’s “fixed” this time. Will be run well in a year? It seems that they can’t get it right and this is the sort of stuff that led me to sell every single CW I had - down to a nice fat zero now. My trust is pretty much gone as far as their QC goes.

I'll be honest, if there were something else in my sights that would fill the hole that this watch would leave, it would have been easily returned last time. I am so disappointed with how things have gone, but when I see it on my wrist, I keep thinking - give it one more chance.

Edit: If I do give it another chance, it really will be the last.

Chris GB wrote: ↑Fri Nov 08, 2024 11:49 pm A further update on the BMF fiasco:

A very quick turnaround by CW - excellent

Auto winding seems to be working well - excellent

So called chronometer has lost 6 seconds in The first full day of wearing - far from excellent.

Where do I go from here? Surely CW QC must put a watch on the test bench timegrapher to check it's accuracy if significant work has been done (in this case, they agreed to replace the entire movement). This one runs obviously slow in all orientations. The movement certificate does not reflect this.

Do I just head for a full refund? Seriously, what the hell sort of joke of a QA operation are they running?

Indeed the owners manual for the Twelve X Ti, another SH21 watch, contains a photograph showing a young feller engaged in the activity I recognise as "regulating a movement dial down on a timegrapher".

tikkathree wrote: ↑Tue Dec 03, 2024 9:55 pm

Chris GB wrote: ↑Fri Nov 08, 2024 11:49 pm A further update on the BMF fiasco:

A very quick turnaround by CW - excellent

Auto winding seems to be working well - excellent

So called chronometer has lost 6 seconds in The first full day of wearing - far from excellent.

Where do I go from here? Surely CW QC must put a watch on the test bench timegrapher to check it's accuracy if significant work has been done (in this case, they agreed to replace the entire movement). This one runs obviously slow in all orientations. The movement certificate does not reflect this.

Do I just head for a full refund? Seriously, what the hell sort of joke of a QA operation are they running?

Indeed the owners manual for the Twelve X Ti, another SH21 watch, contains a photograph showing a young feller engaged in the activity I recognise as "regulating a movement dial down on a timegrapher".

Given that mine is supposed to have had a brand new COSC movement fitted, it shouldn't need regulating. It certainly should have been checked thoroughly though.

A quick update on the BMF saga. The watch was returned again under the promise that it would be for the attention of CW's head of service. The report upon their initial inspection that the watch was running just about within tolerance on the test rig (my experience was that it was not in the real world) but that amplitude was higher than it should be and that the watch would be investigated / rebuilt. It was returned to me four weeks ago and I have been wearing it as a daily to see how it is running.

The first thing I noticed is that the auto winding mechanism seemed more effective than previously, with the watch gaining power daily until full and only losing any reserve while off my wrist. It has been working flawlessly for four weeks. Accuracy wise, they seem to have given it to a regulation wizard. I set the watch to an NPL calibrated clock four weeks ago and timekeeping has wandered very slightly as the power reserve changed, but has never got to as much as 2 seconds away from reference. So after four weeks of wear, we are currently running at just over one second fast overall. Remarkable and it shows what a well sorted SH21 can do!

This was initially my favourite watch and it has regained the top spot in my collection. It has tried my patience along the way though. Here's hoping it stays running like this!