Seiko and Timex are the two brands most people actually choose between under $500, and the comparison is usually framed as cheap against cheaper. That framing is wrong. These are companies with different products: Seiko is a manufacture that builds its own mechanical movements and sells them in volume, while Timex is a quartz tool-watch business that has spent a century making a legible watch as cheaply as it can be made well. Deciding between them is really deciding which of those two things you want.
Movement: the whole argument, in one row
Seiko's advantage is that it makes mechanical movements in-house and puts them in watches most people can afford. The 4R36 in the Seiko 5 Sports line hacks, hand-winds, runs at 21,600 vibrations an hour and holds roughly 41 hours of reserve. It is a serviceable movement with a parts supply and a repair network, which is the thing a cheap quartz watch can never offer: in thirty years, a Seiko automatic is a watch that can be fixed.
Timex's advantage is that it does not care about any of that. Its watches are quartz or solar, accurate to a standard no mechanical watch here can touch, and cheap enough that the repair question never arises. If a Timex dies in year twelve, you buy another one and you are still behind on what a single Seiko service would cost. Which of those is better depends entirely on whether you want a watch or a movement. The underlying mechanism split is on quartz vs automatic watches.
Crystal: where Timex wins, and it is not close
Here is the fact that surprises people. Every Seiko on this page uses Hardlex, Seiko's proprietary hardened mineral glass. The Timex Expedition North uses sapphire. Sapphire sits at 9 on the Mohs scale and is the hardest material in common watch use; Hardlex is a mineral glass and scratches more readily. Seiko reserves sapphire for its pricier Prospex and Presage references, and at the price we are discussing, the American brand has the better crystal. The full material comparison is sapphire vs mineral crystal.
Water resistance and crown sealing
A draw on the number, a Timex win on the mechanism. The Seiko 5 Sports Field and the SRPD93 are both rated 100m; the Timex Expedition North is also 100m, and the Expedition Scout is 50m. But the Seiko 5 Sports line is 100m without a screw-down crown, where the Expedition North has a screw-down crown and caseback. The crown is the one deliberate hole in a watch case, and a threaded one is a better seal than a pushed one. Neither is a dive watch. If diving or regular swimming is the use, Seiko wins that argument instead with the Prospex Turtle, a genuine ISO 6425 200m diver, which is covered on best dive watches under $500.
Size and proportion
Both brands build in the right range for the field category. The Seiko 5 Sports Field is 39.4mm, the Expedition North 41mm, the Expedition Scout 40mm, and the SRPD93 is 42.5mm with a 46mm lug-to-lug. The deciding number is lug-to-lug, not diameter — the measurement that tells you whether a watch overhangs your wrist. Our method for that is what size watch for your wrist, and the field-specific version is what size field watch to buy.
Service, parts and resale
Seiko has a global service network, a huge parts supply and an enormous enthusiast aftermarket — bezels, hands, dials and bracelets for the popular references. A used Seiko 5 holds some value. A used Timex is worth what a used Timex is worth, which is close to nothing, and that is a legitimate argument for Seiko if you ever intend to sell or trade. It is also an argument against caring: the resale value of a cheap watch is not a good reason to spend more on it today.
The honest verdict
Seiko for a watch you keep. The mechanical movement, the service network and the aftermarket make a Seiko 5 the better long-term object, and it is the brand we recommend to someone buying one watch for the next decade. Timex for a watch you use. The Expedition North is the better-specified watch on this page — sapphire, screw-down crown, solar, no maintenance of any kind — and the Expedition Scout is the cheapest honest field watch there is. Nobody should feel talked out of either.
If you are deciding between specific models
Three pages here settle the common shortlists. Timex Expedition vs Weekender settles the cheap Timex question; Hamilton Khaki Field vs Seiko 5 settles Swiss against Japanese; and Seiko SKX vs SRPD settles which Seiko diver to chase.
Both brands in full
Our rankings of each brand's line-up are best Seiko watches and best Timex watches. If the other cheap brand is also on your list, Timex vs Casio is the companion page to this one, and Seiko vs Citizen covers the Japanese pair.
What we are not claiming
We do not own every watch on this page, and nothing here rests on wrist-time we did not have. Each figure is a published manufacturer specification for the exact listing linked, and where a figure could not be verified the spec table carries a dash. We have not scratch-tested a Hardlex crystal against a sapphire one; the hardness comparison is the published material property, not our test. Our method is on how we review.
