Is the eta 6498-2 data sheet suitable for a seagull st3621

[Bill2024]

Hi All,

I have a Seagull st3621 movement (the one with the seconds hand at 6 o'clock position) and I was wondering if there is a suitable technical sheet for it. It seems that Seagull don't produce anything, but as I believe it is a clone of the ETA 6498-2 movement, can I use the technical sheet for that as a guide for disassembly/assembly and oiling? I have seen that datasheets are available on the Cousins website.

I'm a complete novice at this and am just getting ready to start the course but I have bought a few things and started doing a bit of research.

Thanks,

Bill

 

[flandecoco]

Good evening. Personally, I’ve tried using the service manual for the ETA 6497 on the ST-3601 movement, and there were no significant differences. If it’s a clone of the ETA, you might want to give that manual a try. I found this link, which could be useful for you:

https://watchguy.co.uk/cgi-bin/files?showfile=ETA/ETA 6498-2.pdf&filename=ETA 6498-2.pdf&dir=Technical Manuals&action=documents

Additionally, there are some videos online about the assembly and disassembly of 6498 caliber. Best regards!

[JohnR725]

18 hours ago, Bill2024 said:

ETA 6498-2

10 hours ago, flandecoco said:

ETA 6497

all of these movements are based on the base 6497/6498 I have a link below that comments on all the variations at least the Swiss variations.

then I'm attaching a slightly newer version than the above version of the service information seems to have a few more pages.

https://ranfft.org/caliber/10349-Unitas-6498

CT_6498-2_FDE_482480_08.pdf

[Bill2024]

Thank you both.

It’s good to know that there is relevant documentation out there to assist when I get around to trying to assemble a movement.

I’ve always been good at taking things apart but obviously that’s only half the story!

[JohnR725]

2 hours ago, Bill2024 said:

I’ve always been good at taking things apart but obviously that’s only half the story!

one of the important thing is to learn when you're starting out yes taking apart is easy. Putting back together successfully is more challenging. Plus practice practice on this watch practice a lot. Often times people want to practice as they go with the only doing things one time and you really should practice for several days of taking apart putting back together looking at the watch seeing how it runs. Looking at the balance wheel and the hairspring and see how they look look at how they operate. In other words you starting off take some time enjoy it study it and understand what you're doing. The effort done here will pay off later on

 

[Bill2024]

20 minutes ago, JohnR725 said:

one of the important thing is to learn when you're starting out yes taking apart is easy. Putting back together successfully is more challenging. Plus practice practice on this watch practice a lot. Often times people want to practice as they go with the only doing things one time and you really should practice for several days of taking apart putting back together looking at the watch seeing how it runs. Looking at the balance wheel and the hairspring and see how they look look at how they operate. In other words you starting off take some time enjoy it study it and understand what you're doing. The effort done here will pay off later on

 

That’s good advice. I can see that putting a watch together once would be amazing; but doing it 10 times without destroying it is where it’s at.