What movement is this?

[darkpanda]

I was told by the dealer this is J25. How does this movement work? Do i have to wind it?

 

[darkpanda]

 

[zocker4711]

So which one it exactly is i dunno... But it´s an Automatic Movement... You can Wind it by Hand and it should Wind it self by Rotating the Rotor...
That mean if you Wear it, it winds up...

 

[trailboss99]

Some kind of 21j by the looks of it. No you don't need to wind it, it's an auto. That half moon thing you see is a counter weight that spins and winds the watch as you move.

 

[darkpanda]

This movement is quite noisy when it spins. Does it mean i have to oil it?

 

[chaw6125]

It looks like a 2892 clone. Maybe a seagull ST-18 or 19 or whatever it is.