[Alfa Sprint]

Accuracy is out, +30mn / 24 hours, the movement is a 6R15C .... not the best SEIKO movement imho.
What other movement can I install, a NH35? I' d like to use the 6R15 rotor because it' s very well made.

 

[Grammarofdesign]

As odd as it might seem to some, yes you can drop in the NH35 no issue to address at all.

Dial feet will fit and the date wheel are good to go.

Crown/stem will work in this direction too.

Rotor will swap in easily.

Good luck !

 

[SeikoPsycho2]

+30 in/24hr. Sounds like your watch is magnetized.

You can check it with a compass. If it is magnetized I'd try to demagnetize it first.

 

[Guyjean]

I've heard you can just pay a watchmaker to help you regulate it, but I agree with trying to demagnetize it first to see if it improves.

 

[zeke441]

+30 in/24hr. Sounds like your watch is magnetized.

You can check it with a compass. If it is magnetized I'd try to demagnetize it first.

That was my 1st thought too.

 

[zeke441]

I would try the demag as suggested or have it serviced to keep the 6R15. Swapping it out for a NH35 is a downgrade. The cost of a NH35 movement and having it swapped out would probably be close to the cost of a service anyway.

 

[9krpm]

I've been disappointed with my Alpinist as well. I only get about 35 hours of power reserve on mine. It's been back to Seiko under warranty for a large piece lint in the date window, time keeping out of spec, and poor reserve. They removed the lint, and regulated it so it is quite accurate, but they didn't seem to address the power reserve. 35 hours of power reserve from a movement rated at 50 is pretty disappointing, and my SKX007 lasts noticeably longer.

 

[marks]

check to see if your balance spring is in order and not touching...

 

[Katgirl]

Yup! It’s probably magnetized. I have heard more than a few complaints about this movement, but the 5 or 6 in my collection are all fine. I would have it serviced, rather than swap in a cheaper movement.

Kat

 

[Wolfgang Holtzmann]

nh35 swap is a bad idea. Its like you're turning a collectable seiko into a depreciated noname micorbrand or homage. It will also cause a disclosure problem for any and all resales in the future. I would personally be pissded if i found a generic 65$ Hattori movement in place of the genuine, largely irreplaceable 200$ original. Regardless of what you think if it's current performance.

If it's running very fast it could very well be magnetized. It could also be debris or oil caught in the hairspring, effectively shorting the rotational distance of the balance. Putting it on a timegrapher would be helpful. Personally, I don't think power reserve matters with an automatic if you are of course wearing it. Manual winding yes, PR matters a lot. The issue may have to do with either the mainspring slipping in the barrel too much which a barrel service would correct. Conversely it could use a cleaning as it may be stopping too easily as the result of friction along the train and/or escapement. Either way sounds like it's time for a service. Maybe time to find a good local watchmaker.

 

[Grammarofdesign]

I respect the OP's right to do what he wants with his watch. If and when he chooses to sell it, he can show a photograph of it and call it out and fully disclose it and be transparent and so forth. I gave him the benefit of the doubt to do the right thing if and when a sale ever happens.

And even if he didn't, it's a minefield buying used watches. When I buy a watch that I have not seen a photograph of the movement or had it described, I know I am aking a risk. And you better believe I price it accordingly assuming the worst.

I've seen more than my fair share of Mercedes S-Classes running on Cooper tires! What am I going to do, leave a note under his windshield wiper?

 

[Wolfgang Holtzmann]

I've seen more than my fair share of Mercedes S-Classes running on Cooper tires! What am I going to do, leave a note under his windshield wiper?

OP is asking for guidance, it isn't unsolicited. It's like if I asked, "Grammar, my AMG tires are going bald, these Coopers are the right size will they work? And I think I can mount them myself... "

 

[Grammarofdesign]

I've added the day wheel mod to a few 6R15s and dropped them into SKXs. Easy enough to do.

This is the reverse of what our OP wants to do - so the question is- I am wrong to do it?

 

[Katgirl]

I've added the day wheel mod to a few 6R15s and dropped them into SKXs. Easy enough to do.

This is the reverse of what our OP wants to do - so the question is- I am wrong to do it?

No, you modded a watch like many do, not lessened the value, by swapping in a cheaper generic movement. That’s not the same thing.

Kat

 

[vincentg]

What about just swapping in a new NE15? Depending on the watchmaker the sub $200 price is still a better value than a service I think and then it would all be hunky dory

 

[Grammarofdesign]

I think the OP wants the look of his watch and is sick of the 6R. It's his watch. He asked for guidance 'can it be done' not 'should I devalue it by using a 4R series?'

Do it!

 

[Alfa Sprint]

NE15 movement is more original part?

 

[Grammarofdesign]

NE15 movement is more original part?

View attachment 508355

Yes the NE15 is a 6R15 as sold to generic watch manufacturers. Swap on the rotor it becomes a 6R15.

 

[Evolutionary Reject]

How long have you owned the watch? Newly received and it arrived running fast or has it been in your collection and developed over time? I am just curious as to how this sort of movement behavior occurs?

 

[peterrizzo]

my 2¢, whenever a watch is running erratically, demagnetizing it has worked every time.
especially if it's off by minutes, not seconds. and i think the cause is wearing my watch
around my laptop, the laptops have a few magnetic hotspots in them.