indestructible, keep practically perfect time, and last for generations.
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Big order which most watches cannot do.
Beyond those which we'll get to, nothing about a watch has been given us for a recommendation. It's not different than a gun or car - you don't go out with $50,000 and start shopping for anything. There are needs to meet and if they aren't met then the used car/gun/watch forum gets a workout. That isn't hard to avoid if some due diligence is exercised.
Obviously the watch needs to communicate what time it is - so, in what conditions? Underwater? In pitch dark areas? Full sunlight? Strangely enough all you need to do is see the hands (or digits) and you can orient them by looking to determine what time is indicated. If the markings have good lume it helps but is approaching decor when everything on the dial and bezel has neon intensity - such as with tritium capsules.
And they come in exciting different shades of colors too. Lume is its own decorative element. Dial color, too. White is classic, black adds good contrast, orange for that last iota of readability at an extreme depth of water. Then there are all the other shades of the rainbow, and looking around, they have all been used.
What shape those markers on the dial, and the hands, and any subdials starts getting involved too. At this point it behooves use to open up the discussion to what style watch is desired - just like cars and guns. A 1911 or Chevelle 396? S&W 4566 Tactical or 3/4 Diesel brodozer? There are some expensive G Shocks out there, I don't think that's what you're looking for. So what style watch - and does it actually do what you need? A Cocktail Time dress Seiko won't cut it late at night in the pouring rain when a Dive model with good lume could serve better.
AFAIK there are no search engines that select it for you, and yes, it's a bit confusing. Now add the complications, starting with date, then day, a GMT which indicates a different time zone (another hand, not digital readout,) compass (only with quartz,) moon phase, tides, altitude, barometric pressure, altimeter, tachymeter, ad infinitum. Which leads to -
Mechanical watches and digital watches have some complications that are mutually exclusive. Mechanical watches are often rated by the number of jewels used as axle pivots, and their speed - beats per hour, such as 18,000 or 26,000. The more beats - traditionally - the more precision. And that gets to the three things mentioned.
A $1,500 watch isn't often sold to be an indestructible beater. More often than not they are dressier, with the implied task of communicating social rank, not welded steel plate toughness scraping adobe walls in Afghanistan. They are good stainless cases - highly polished - and in an environment like a auto parts counter will pick up a worn patina in just a few weeks. I have that with a Seiko Orange Monster, barely three years old and it looks like it's been swimming with the sharks. Rough. Not to forget the higher end sapphire crystals are really good looking but are more prone to shattering than a treated mineral glass. Indestructible in a watch usually means a rubber G Shock or Dive model - at $250 - where nobody is worried about the finish. Its going to be treated like a shovel? Don't buy a presentation grade one scoop ceremony gold plated shovel for digging out sewer lines.
Perfect time? Then you would prefer a quartz watch with radio reception of the atomic timekeeping signal, or GPS signal, and then it's limited to battery life replacement. Casio makes those, marked down to $50 at my local Walmart. Other than that, quartz - regulated and certified as a chronometer - will keep better time than a mechanical, which has a lesser standard, even according to the Swiss. Last is an autowind mechanical and truth be known, most buy them because they DO have to finesse them once a month or so to true up being off a few seconds.
Is being off a few seconds a month an issue? That watch isn't going to fix being two minutes late leaving for work, bring back the plane from the loading gate, or get you to rescue a fair haired maiden from the tracks just in time. Almost any $40 commodity watch can do that. The rest is up to you.
And last for generations? Check the vintage watch sales forums. Unless they are regularly serviced - which costs as much as a decent watch these days - and are sheltered most of their lives, watches do not pass down from generation to generation. Despite the hype marketers pitch out of their work stables. A used watch is exactly that, and in a lot of cases they look and perform like one. It also goes to them being built to a price in those days - the expected life of a watch was certainly a lot less than now. No one can predict if any watch will survive being worn on the human wrist and still be handed down in the same impeccable shape as the Crown Jewels. Only those worn to coronations and like ceremonies seem to do that. Museum quality watches are rare - most of us beat them and will continue to do so.
Check the nicer watches on older mens wrists, you will see scratches on them just from desk wear or getting banged on the interior corners of their work building. And if they do hand them down, what JR gets is a two tone silver and gold coffin link bracelet holding a 36mm white dial day date with gold markers and hands, a discoloration on the dial from lack of a good seal, scratches on the buckle, and long long long out of fashion. Very few wear grandpa's watch, even few depend on them. Watches are for the most part jewelry which when damaged beyond economic repair are simply thrown in the trash. The better ones - Omega, Rolex? Disassembled for their parts, just like a wrecked Studebaker.
Some will say you can still find a grail watch that meets the criteria, but like going out to buy a car - what is it you really need beyond spending $1500? Define that with specific features and it will likely fit better and be less a disappointment after you own it. And don't park your new one behind the bleachers at a Little League game where a foul ball will smash the windshield. The horror threads of new owners dropping their Rolex crystal down on the tile floor in the bathroom make us all cringe.