Zaf can you tell if this watch has any value please thanks

Zaf can you tell me if the milus gallery collection Rolex watch has any value please

Thanks

Many thanks. Could you tell me what the value is of this watch. Also what does a gallery collection mean.

Attached is the picture of the back of the watch

I will try and send a picture. The back of the watch is made up of steel? Cannot upload
The pictures
It is a gallery collection quartz the number is 510.31

Many thanks for the advise I will try it and let you know.
Would you happen to know the value of this watch?

Look at the first picture could be perspiration? Or water?

Starting of the strap from the watch it is Black and I am afraid to
Give it to someone to clean it.

Can any one let me know if the black stain on the strap can be fixed.
It is a milus gallery collection watch

Thanjs