Wound it?

 

Ok, now I'm kind of embarrassed -- I thought since it was automatic so I wouldn't have to wind it. My other automatics would just "charge" up during the course of regular wear during the day and keep ticking no problem over night. Do I have to wind it because it's brand new to break it in or something?

 

Sounds like you most likely have some binding in the watch. As your wearing it, the winding action is giving the train enough power to keep moving, but as soon as it lets off there isn't enough power to move any longer. One of the causes could be a faulty mainspring, either way Id either send it back or get it checked out.

 

Ok, that's a good tip. I'll check in with manufacturer. Thank you

 

Put 60 turns on the crown. Make note of date and time. Don't wear the watch. See how long it runs before stopping. You should get about 40 hrs. When fully powered down, put 30 turns of power before wearing...more if you have a desk job. If PR is less than 38 hrs, you may want to consider warranty service.

 

This is super helpful -- thanks very much, BenchGuy!

 

I hate to say this.. But I didn't know Seiko actually made a movement you could hand wind anymore. What sometimes happens with Seiko's it the oil/grease they use dries up on the mainspring and it literally binds up and gets stuck. Sometimes if you give them a love tap on the side of the 9'oclock position, it frees up the mainspring and they start working properly.(Though it's a band aid fix and it should be serviced). But since you can actually hand wind it, I would wind it all the way up to the top until it slips, just to make sure the spring is free.

 

NH35a movement is definitely hand wound in addition to automatic winding.

 

Yes, I know this thread is ancient (!) but just found it with a google search. My Nubeo Manta is fitted with a NH35 movement, and I have done 2 x tests recently on the 'power reserve'. I fully would the watch (about 40 turns of the crown) and left it alone. First time it took 47 hours 20 minutes to stop, the second took 47 hours and 50 minutes to stop. I was really impressed!

Bought a new watch, it wasn’t a G Shock, but a Nubeo...

At the beginning of the year I spotted a watch on a TV shopping channel I really liked the look of, but it was just too expensive. Saw it again recently at sub £200, so decided to buy it. Now let's get the brand snobbery bit out of the way. On extensive research, I concluded that the brand...

www.watchuseek.com

 

I'm late to this thread again but I have more discussion that might help someone-
I've owned a lot of watches with 7s26 movement and my understanding is that the NH35 is the same movement with some additional features. I always had occasional trouble with 7s26 movements and power reserve. I would put a watch on at about 7 in the morning, wear it until 11 or later at night, and the next morning it would not be running. My theory was that I was not active enough in my office job to build up enough power reserve. I was down to just one 7s26 and that one was working pretty well for me then I bought a Deep Blue with NH35A movement. It was having the same problem, even after I wound it a bit before putting it on the first time. Actually I bought it used and I wasn't completely certain that it was NH35A and not Miyota so I took the back off and looked. While I had the back off I looked at the gears while I hand wound it and saw that everything was working. The crown guards on the case and the way that I wind it, it probably takes 2 or 3 movements of my fingers to rotate the crown 1 complete revolution. It seemed that I had to go about 100 little movements to wind completely so I did and then I wore the watch for 8 hours. I took it off the day before yesterday and I'm watching it now. So far it has been setting on my desk and running for 37 hours. Next I'll try wearing it for a full day to see how much power reserve the automatic windind mechanism gives it.
I've owned watches with ETA 2824 and 2892 movements, 7s26, 6r15, and the Miyota 8000 and 9000 series. The 7s26 and sometimes the Miyota 8000 movements were the only ones that gave me problems with power reserve. For anybody who has problems with power reserve I would suggest winding the watch some before you start wearing it, or get yourself a cheap watch winder.