I am toying with idea of mirroring your work but tying it to a gps reference. If prices drop on these clocks I will put them throughout house and have inexpensive masterclock system.
Yeah, I think that would be cool. If you hook up a GPS tied NTP server as the primary time source on a home network, will WiFi devices connected to that network synchronize to the LAN time source instead of of the WAN?
Nice choice on watch too. Extremely capable timepiece there. Tough solar is the bomb. My travel watch is a Casio PAG 80T. Steven Harris wears a PAG 240. And Nutnfancy is also big fan of the casios. They are quickly becoming the ubiquitous prepper watch.
There's a lot to like about Casio watches right now. You can drop anywhere from $3k on a titanium MR-G with GPS hybrid sync all the way down to $13 on a Sport Analog "Dive" Watch

Speaking of that $13 dollar watch, I just pulled mine out, along with my other non-radio-sync, non-solar watches, at least the one's with functioning battery, to see how far off they are since I last set them in February 2017.
Casio MRW200-1BV Analog $13: 4min 55sec slow
Casio W800H-1AV Digital $12: 35sec fast
Timex Analog early 1990's: 3min 10sec fast
Suunto Vector early 2000's: 5sec slow, which is impressive. But even more impressive was the fact the battery hadn't run out in 20 months.
Damn, I think performance per dollar that W800H is looking like a winner!
