This is a near-mint 42mm Zenith Grande Chronomaster Flyback GT Moonphase 03.1240.4001 with the famous El Primero movement. If you know about Zenith watches, then you know about this watch. It comes with all boxes and papers.
I am waiting to receive this watch from the authorized service center for a very thorough regular maintenance (costing over $800) to make sure that this watch is in top condition, since it is about time and it was a regular wearer for me.
List was over $12K USD, the same watch is being sold at over $7K each, but my price now is $5,200 FIRM and Shipped within USA.