Great info and pics Paul and yes its a great place been there quite a few times.Fact John Harrison's marine chronometer a watch made nearly 300 years ago is as accurate or more accurate than best Swiss watches made today and without a
parachrome hairspring.
So we haven't progressed a lot accuracy wise in over 300 years since Harrison's day. So most Swiss COSC tested wristwatch chronometers are, by the almost 300 year old 18th century navigational standards imposed on John Harrison,H4 watch,quite laughably inaccurate, even by todays standards.How about just 5 seconds slow after 63 days at sea,in one of the toughest environments known to man, not bad for a almost 300 year old watch.Now in those days no modern machinery no computer design no robots,just his bare hands and crude tools.Now when some of you guys look at your watch and moan because its a few seconds out you wont feel so bad. Just think and get into perspective a real watchmaker like John Harrison .