Hey all, can I get your opinion on the validity of this square watch? I don't know much about longines. Is the two tone dial original? Thanks!

https://www.etsy.com/listing/222628588/vintage-art-deco-longines-23-z-movement#

 

it's not a two tone dial but a sectioned dial.

 

Did longines make watches like this or is it a redial?

 

It's a quadrant dial, and Longines did make them - but it still might be a redial.

 

I think its original.

The figures which are part of the dial surface and not applied (not removable) have nice sharp edges, they typically get polished a bit as part of the refinishing process loosing their crispness. Probably would have lost the quadrant bevel at the same time.