Tudor "Biwan" BB - Movement Question

[m5750]

Hey guys. Far from an expert here. I have a few questions though about a cheap Tudor I got on AE.

1. Can anyone identify this movement? It's not an NH34 that I can see, but runs at 21,600 vph. It's set in a plastic movement ring, which I understand.
2. The case is a 41mm
3. The dial is 31mm
4. It's a GMT movement. If this is the case, could I swap this with maybe a 2836 or something else? (This is where I need help), or am I wasting my time? It's something I picked up to tinker with (around $150 piece). It's cheap, I know, but is kind of a "practice mod" thing for me.
5. The case and bracelet are surprisingly really nice. Just looking for ideas or if I'm being ridiculous here.

 

[Hor-Fan]

It’s a 3804b, GMT version of 2813. The case will accommodate a HZ6460 and the gmt hand will transfer but you’ll need to replace the other hands with an ETA set.

 

[m5750]

It’s a 3804b, GMT version of 2813. The case will accommodate a HZ6460 and the gmt hand will transfer but you’ll need to replace the other hands with an ETA set.

Absolutely amazing. Thank you SO much. I figured it would be a long shot, but hey, learning experience. Thank you!!!

 

[m5750]

Absolutely amazing. Thank you SO much. I figured it would be a long shot, but hey, learning experience. Thank you!!!

Is there an ETA movement that would fit this case, by chance?

 

[Hor-Fan]

Is there an ETA movement that would fit this case, by chance?

The Hz6460 is an ETA 2836 clone with gmt works, same as A2836 GMT.

 

[m5750]

The Hz6460 is an ETA 2836 clone with gmt works, same as A2836 GMT.

Maybe a dumb question. But the date window on the dial I have seems small. Maybe I'm looking at this date wheel as being bigger than it is? Would this be a direct swap with the movement holder that I currently have?

 

[Hor-Fan]

Maybe a dumb question. But the date window on the dial I have seems small. Maybe I'm looking at this date wheel as being bigger than it is? Would this be a direct swap with the movement holder that I currently have?

The window on your dial appears to be in the eta position, so the date wheel on the movement shown should line up with it. The movement will probably work with the plastic movement holder but you should consider getting a higher quality metal one.

 

[m5750]

The window on your dial appears to be in the eta position, so the date wheel on the movement shown should line up with it. The movement will probably work with the plastic movement holder but you should consider getting a higher quality metal one.

I appreciate all of your info. The more I think of it, with the cost of the watch, and what I can get from my TD, it might not be worth it to have this as a "play" watch, and should toy around with NH35's instead hahaha.