Precision production advances? Check out the work of Abraham Louis Breguet and the "Marie Antoinette" commission along with his other works;
"Considered as “Queen” or “Mona Lisa” of all timepieces, the Breguet No. 160 is a horological masterpiece by genius watchmaker Abraham Louis-Breguet. It was commissioned in 1783 as a gift to Marie Antoinette by an unknown admirer. It was completed in 1827, 34 years after the death of Marie Antoinette and four years after its maker Breguet passed away.
23 complications are encased in 18-carat gold and a clear crystal glass dial to show off its superb mechanisms. Perpetual calendar, thermometer, shock-absorbing device, the phases of the moon and a repeater that chimes the hour are some of its features, the movement plates are optically perfect machined natural crystal to show the details of the mechanism in detail."
http://luxguru.typepad.com/lorre_wh...es-of-intriguing-history-breguets-no-160.html
Precision line production? Check American Railroad Standard Watches, Webb C. Ball, and various manufacturers of them.
The most complicated watches ever made, the watches considered to be best craftmanship ever are present watches from Patek Philippe and Vacheron Constantin.
The most precise watches ever made are from present time.
The most advanced technology in any watch is also from present time with radio control and build in sat-nav, watches with ability to go deeper into the ocean than ever using gas to keep water out.
Technological advances.
And back to the tolerances in car engines.
If this was not the truth, the engines would not have been able to produce more power AND return a better fuel consumption than ever.
Service intervals are getting longer in between.
New technologies to control valve timing, to inject fuel, new materials to make the racing engines lighter, double clutch transmision.
New technology all over.
This is also a fact within materials for tonearms and cartridges.
S-arms and J-arms of yesteryear might have been high-end back then but measured with todays standard, they are no longer.
A 3D print might only be plastic but a clay mock-up of a car, a 3D graphic on a PC, is also the beginning of tomorrows supercars.
As is it with mechanics for high end audio.
A one piece aluminium Plinth of 60 kilogram have never been made before now.
Suspension elements from car technology can be adapted into turntable construction.
Never have computercontrol of suspension had such a huge influence on roadholding and security.
So some of the very succesfull turntable manufacturers from yesteryear, even though they were inactive for a decade or two, are getting back into bussiness, launching some of the most innovative and expensive TTs ever with their suspended constructions.
Magnetical drive, hydraulic drive, plinth made out of one whole piece of Norwegian rock, new belt materials, new platter materials, motor control precision have never been better no matter drive system.
Never have it been possible to grind a diamond with such a precission as today.
Never have man been able to physical manipulate so microscopical elements before.
Precisions in bearings have been better than today.
Laser sharpening of knives and blades for precise balancing of some armbasing have never been better.
The number of decimals to calculate geometri of the arm movement over the LP have never been more precise.
Jump out of the vintage illusions and get your feet grounded in present time.