Very nice !
Make sure he realises the importance of keeping everything with it as provenance for the future.
I have some photos of an 18ct Day-Date presented to a VERY famous golfer, whose family we acted for recently. Can't show it, sadly, but such pieces are of great interest. Hard to value when the provenance / status of the wearer is often unique. I'm usually a sucker for them and can thank only good fortune that I resisted the urge to pick up Savile's Day-Date when it came up at Dreweatt & Neate a few years back.
Thanks for posting. There won't be many of these 116334s around in future, never mind one with the history and interesting case-back.
Haywood