Edit 23 June 2022: I am putting this watch back up for sale. US$3,000. For sale is Heuer's first ever dive watch, the 844 Monnin. If you want to know more, there's a good article at https://heuerville.wordpress.com/2011/10/17/heuer-844-monnin/ This is a fantastic example with the cathedral hands, non-tramline bezel and movement and case back stamped by Monnin (which is rare). Watch was serviced about 1.5 years ago and runs perfectly. Movement pictures are from watchmaker in that time period - I don't have tools (or expertise...) to open a case back. Any questions welcome. Delivery to CONUS or UK (I travel between the US and UK regularly).