This is possibly the best video I have seen that spells out the difference between the ETA 2824-2 movement and the Hamilton H10 / H40. I have been concerned about the potential loss of the ability to regulate the watch, but my mind is now a little less anxious about it. Good to read other comments below about the Powermatic movement, certainly not a deal breaker as long as it's the 25 jewel version.

Great review! Thank you for providing information that's good to know!

Great information, thank you for the video. I got the khaki king yesterday for my birthday. A watch I have been wanting for some time. Good to know the H40 will take care of me for the forseable future.

Let me enlighten you on Tissot Powermatic 80. There are two versions: one with the plastic pallet fork and that one has 23 jewels (like e.g. the Tissot LeLocle powermatic 80) and one with a traditional pallet fork and this one has 25 jewels (like e.g. the Tissot Gentleman Powermatic 80 with silicon balance spring). By the way, the Hamilton H10 and the Powermatic 80 with 25 jewels are exactly the same movements (except for the silicon balance spring in the Tissot) but with a different branding. Same power reserve, same beat rate (3Hz). The H40 has also a day of week complication, while the H10 has only a day of month complication. Both Tissot and Hamilton are owned by the swatch group and they source their movements from ETA (they don't have a choice), who will adapt them to their specs. Also, both the Powermatic 80 and the H40 can be regulated, but not in the traditional way. The balance wheel contains two tiny opposing weights that can be moved either to the center of the balance wheel (will go faster) or to the border (will go slower) and it allows a +10 to -10 seconds a day adjustment. The problem is that both opposing weights have to be at exactly the same position of the center of the balance wheel; otherwise you will induce a beat error (the time between the tic and the tac will be different from the time between the tac and the tic). The "laser" adjustment is just a marketing trick and does not add anything essential to the movement or its quality. (It rather worked the other way around; people didn't trust it and think their watch cannot be serviced unless by Tissot/Hamilton themselves). It's not that I don't like the Hamilton watch(es), but you should really inform yourself before criticizing other brands just because you happen to like the Hamilton.

The plastic in the powermatic is delrin. Hardly just plastic. And non corrosive. The delrin actually offers a number of material improvements over the metal including lower temperature expansion and increased lubricity. Plastic is not necessarily a detraction. It depends on the part and the functional requirements. I have a mechaquartz ETA with plastic parts and it improves the movement while lowering the cost. You may not have good feelings about plastic. But facts don't care about your feelings.

Adding to my previous comment after buying and owning a Hamilton Khaki Aviation Pilot Day Date with the H-40 movement. I’ve had this watch since December 2021, it’s now mid-April, and like the Khaki King in the video, it hasn’t missed a beat in all this time. Less than 1 second a day fast, and because of the power reserve, I’ve noticed I can take it off on a Friday, but it back on come Monday, and whilst it’s been in the watchbox, it’s lost those few seconds gained from the week, so it’s bang on again.

I don't care for the power reserve. I'll swap that junk out

One thing to consider is that buying an ETA 2824 is likely to be a better investment for collectors. Personally I own the one with the H40, and as much as I agree with you, if you have one that gains 1 second per day, you are one lucky guy. My Khaki King loses about 6 seconds daily. I'd be happy as a clam if it gained that much; I could hack the watch every morning and always be within 6 seconds of the correct time all day, no problem. But hacking a slow running watch every morning gets tedious fast. I love mechanical watches but since the movement can't be exact, watchmakers could at least make sure their watches run a little fast for us conflicted-personality types (OCD/ADD), who want correct time, but not quartz or Apple.

Nice video. Thank You. Do you know the lift angle of the H-40?

I live in Houston Texas I have a Hamilton what has 694-A movement will the E T A movement get the watch ticking, I mailed it to Hamilton in California and they stated 694-A parts are not available and mailed it back to me ! Can you fix it ? Or H-40 ?

I would have liked to see these face up to compare the sweeping

I owned a Hamilton khaki King(H40). The H40 movement indeed is better in term of accuracy(almost chronometer grade) & lasting 72 hours of power reserved compared to ETA2824. The price is yet a friction of some popular brand. Long term effects on movement not known yet. At least it works flawlessly for nw.

谢谢分享～

Yeah. It's a Powermatic 80 movement when sold under the brand Tissot. Both are in reality one and the same thing a SWATCH movement.

Silicon is not plastic. Did you think the chip in your phone is plastic?

I’ve had a khaki king and now a khaki field auto both run 0.5 seconds a day. H40 in the king and H10 in field…

I would not be concerned by the H-40 movement at first. A few years from now. that might not be the case. The real concern is that I will have to send the watch back to the factory for service. My usual watchmaker will not be able to do this, as I understand it. That is completely unacceptable. I want the ETA.

Love you bro. Thank you.

Couldn’t care less about 80hr power reserve, 38hrs is plenty for me, but the low beat 3hz is a turn off. Hard pass for me.

I've just picked up the Hamilton khaki aviation day/date... Yes, the Interstellar Cooper watch. It's my first swiss watch and maybe my last. How fortunate that my grail watch is a Hamilton and not a Rolex or Patek or something lol. Coming from watches with NH-35/36 the lack of adjustment did concern me... But... It's running dead on accurate! Nothing to worry about, and I have absolutely no reason to open up the case and tinker. Fantastic movement the H-40

I have the H40 and I continuously get +3 to +4 a day max. Every 2-3 weeks I hack the second hand to put me about 30 seconds slow. That way I’m never off from the exact time more than 15 seconds either way.

Hold on, the Hamilton is a day-date. Wouldn't the equivalent to the h40 be a 2836? Anyhow, I still prefer the old school eta2824 as it's easier for me to regulate it myself. A free sprung balance is very good, but harder for the owner to regulate.

Most interesting precisions. Combined them with @Peter de Gaelan's comment, and you have the whole story down, IMO. =)

Great video.... but Portrait aspect ratio. What the fuck lol

"some bozo tweaking this thing in 2 positions at the factory on a Friday" lmao

This watch is perfect for teenagers....