Jump to content
  • 0

Tissot Seastar 2481


Hi Gents,

I have just bought a Tissot Seastar 1970 with a 2481 movement.

 After opening the back, it seems it is in fairly good condition. No rust or dust.

 It is ticking well and what I really like in this movement is that the date can be set by pushing in the crown. And this is where the problems start. After a couple of pushing, I could not be able to set it anymore.
I was going to take apart anyway to clean and lubricate it.

So, as soon as, I started dismantling the movement I saw that the problem caused by the return spring, not in place. I assembled it back again and the date moves smoothly, however, when I want to set up the time and pull the crown out the castle wheel does not reach the intermediate wheel even if the return bar and spring seem to be at their right place. The check spring is not bent. When the crown is pushed in, I can wind up the watch.

Maybe the return spring? I have no clue.
Have you got any idea how to solve this problem?

Sorry for the poor quality of the picture. Hope it helps though.
Please detail your answers as I am just a beginner.

Any help is much appreciated.


WhatsApp Image 2019-02-04 at 14.11.56.jpeg

WhatsApp Image 2019-02-11 at 18.25.34.jpeg

Share this post

Link to post
Share on other sites

6 answers to this question

Recommended Posts

  • 0

Think this is a nice movement too, but on the other hand I say that about all of the mechanical ones.
These have that push change of date. When I look at your picture I miss the part changing date it's a small lever marked with a yellow ring if this is put back the wrong way it will cause some problems. 
I add some pictures of how the key less work should be reassembled.




Share this post

Link to post
Share on other sites
  • 0

A pizza and five beers later it's time to reassemble the date part. Must say it's a hairy work if new to the trade.

I start with putting back the date lever spring. make sure you get the setting lever into position.

Next I put the date lever into place, make sure the little nob on the lever ends up in the little **BLEEP** in the spring.
Now I switch side..




Share this post

Link to post
Share on other sites
  • 0

A tip is to insert the date jumper spring into the bridge fist, use a peg wood to push it in place.

Put the date lever into place and gently slide the bridge with the click spring into place.

Next I put the datering into place and check the date click end up in the grove.




Share this post

Link to post
Share on other sites
  • 0

Thank you very much, guys.
I actually assembled it back together on Friday night. Now everything works like a dream.

Delgetti, you were right, the lever was upside down so it could not push the castle wheel all the way to the intermediate wheel. Soon I turned that, I could see that such a silly mistake I made and did not spot it for so long.

Special thanks for you HSL for the great pictures and explanation. You must have some serious skills if you got it working after five beers. :biggrin:  Sometimes I feel that my hands are not steady enough even without beer.

 All your information will be even more useful when I strip the whole movement again for cleaning and lubricating soon.



WhatsApp Image 2019-03-19 at 13.19.07.jpeg

Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Answer this question...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Recently Browsing

    No registered users viewing this page.

  • Topics

  • Posts

    • Hi! Thanks for the reply. I did release the power, but I think the pivot snapped during disassembly cause I knocked the escape wheel with the tweezers.  
    • 8215 isnt the easiest to put back together as there are too many pivots to line up. Takes a lot of patience. Also did you remember to release the power before disassembly? That's how I snapped the escape wheel pivot on one of mine. The click isnt the easiest to find. Pretty easy to overlook.
    • As we all know, our world has been deeply shaken. Lifestyles, routines and every partXa,a of our lives have been effected in some way. This is equally true  for our children. Their academic and social life's have also been upended.  As  a father of 4 who range in age from 15 to 24 this new reality is all too acute. My youngest two are still in high school with one a freshman and one a sophomore. They have been pretty much on their own with getting their online classes up to date and completed. My daughter, who is also my youngest, has been on task the entire time, she had finished her work last week. My 17 year old son has procrastinated much of the entire time. 4 weeks ago he was in danger of flunking. So, as an incentive, I offered to get him his favorite watch which is a duplicate of mine if he finished with at least a C average in each class. In this case, it's a 1978 Timex Falcon Eye. Thankfully I had found one for an absolutely fantastic price, a steal to be honest. When it arrived, it was pristine! Tonight was his final night. The final assignments were due. He plugged away and by 9:45pm, he crossed the finish line! And as required, no class was below a C grade point average. In fact, only one was a C, the rest were comfortably within B and A averages. I'm very proud of him and it was a Thrill and an honor to present his watch to him. For fun, I had him put on his new watch but told him he was trying on my watch to see how victory feels. He was all smiles and kept saying how awesome the watch is. Then I held up mine on my wrist and put it next to his and said, yep, it's almost as cool as mine! He was like, What!? Is this mine? No way! He was so excited! Totally worth the wait. Here they are, two of the finest original 1978 Timex Falcon Eye's you'll likely ever see!
    • Pictures don’t always help so I always use these compartment trays, these I get from a hobby store in the paint section. But Esslinger sells nice ones with lids....each piece I remove goes into one compartment with its respective screws. Each compartment represents a step. When i reassemble I work backwards. As far as a bridge that uses different length screws you can always attach the bridge and look from the sides and tell where longer screws will go. Or by seeing where they screw in from under. Kinda hard to explain but just observe and you will get the picture.
    • Hi Everyone!  I have been practicing watch servicing these past months. So far I have successfully serviced a ST36 (ETA6497 clone), thanks to Mark's watch repair course which is awesome! I have also tried to service a NH25A, and messed up the hairpsring (replacement on the way), and a Miyota 8215. Everything was going well with the 8215 until I reassembled the train bridge and noticed that the escape wheel wobbles when I turn the wheels. My guess is that I accidentally broke off the upper pivot during cleaning. I was looking for a replacement escape wheel and found it at Cousin's, but they are out of stock. Anyone know any other place I could get one? Thanks.  PS: Trying to keep a positive attitude after messing up two movements, but practice makes perfect. :)  
  • Create New...