This page lists some links to web sites where you can buy 24 hour clocks. These companies change their sites around a lot, so the links below go dead quite quickly. Let me know if you find anything else, or broken links. Also note that many firms are unwilling to ship clocks to other countries, and if they are, the shipping costs may exceed the value of the time itself.
Here’s Chris Wiegman’s single-handed Life Clock:
This modestly-priced clock from Seldec Publishing is ideal for people who want to switch to 24 hour timekeeping one step at a time:
For this and other 24 hour clocks, visit Seldec Publishing.
I like the concept of Peter Stathis’ Knowhere clock, the “One World” version:
It comes with 8 blank hands and some city labels. Depending on where you live, you may have trouble finding it.
If you search eBay or Amazon for “24 hour clock” you’ll find plenty of inexpensive clocks, like this one, branded “Great Gadgets”:
Office Clocks sell a good range of 24 hour clocks.
Franklin Instruments might be worth trying. The version shown here is unusual in also showing metric minutes (1 hour is 100 centiminutes):
They also supply sets of 24 hour clocks (for time zone displays). However, a commenter has pointed out that their customer service is poor. Be warned!
This next clock was from the Design Boutique (http://www.designbutiken.com). Sadly they don’t seem to be selling these anymore, but you may be able to track these clocks down secondhand.
This was seen at Decoration Marine, in France. (Thanks, Francis.) It seems to have gone though.
Try looking in offbeat places: military equipment stores, ham radio shops, etc. For example, a good place to browse for 24 hour analog clocks is Universal Radio’s clocks page.
A number of US companies sell ‘military-style’ 24 hour clocks. These usually have zeroes for the early morning hours, to accord with the 24 hour time format as used by the US military. This is a model from Benjamin Michael Industries, who appear to have gone out of business as of January 2014:
Millennium ClockWorks supply this one:
although I think they have also stopped trading.
For the astronomers, here’s an analog sidereal clock from Bryan Mumford:
This doesn’t keep 24 hour solar time like the others on this page, but follows sidereal time, the time of the stars. A sidereal day is about 4 minutes shorter than the solar day. This clock is accurate to 5 parts per million at room temperature.
Marathon Watch used to make these excellent-looking 24 hour clocks with sweep second hands:
The next clock is nearly a 25 hour rather than 24 hour – it’s a lunar clock rather than a solar one. Find this and some nice tide clocks at TideClocks:
This modern Roman Numeral clock quartz clock, in a silver aluminum frame, has a set of roman numerals from 1 to 24, rather than (as is more common) the arabic numbers. The appearance is similar to the Shepherd clock at Greenwich.
You can still buy these from eacombs.com, but you’ll have to email them to obtain prices.
This clock’s got four hands:
I saw this at Franklin Clocks web site. There are two hour hands, one red, one black. It will be particularly useful if you often need to know the time in two different parts of the world – perhaps the time in another office, or of a friend who lives abroad. It wouldn’t be as easy to do this with a 12 hour clock face. If, for example, the black hand was pointing to 8 on a 12 hour face, and the red hand pointed to 2, you couldn’t tell whether the red hand was 6 hours earlier than the black one or ahead of it.
Here are some other places where I’ve seen 24 hour clocks for sale. Be aware that these folks change their web sites often, and as a result some of these links might be broken. Try their main page if any of the following links fail:
FinePots 24 Hour Pottery Clock
Chicago Lighthouse – currently not sure about the status
Spinners Pilot Shop sell a Zulu 24 hour quartz clock.
If you want to try making your own 24 hour clocks, it’s quite easy. You can buy 24 hour quartz clock movements for about $10. You need to make and design a dial, drill a hole, insert the movement, fix the hands, and add a battery, then put the whole thing in a box. One suggestion is to get a picture frame box – the movement can be mounted at the back.
This is the first one I made:
There are many companies that sell 24 hour clock movements. Try Megaquartz, Clockworks, or klockit.com. You may need to use the word ‘military’ in your search, because one of the primary markets for these movements is the US military.
Steve made this clock:
Here’s a walk-through showing how he did it.
24hourtime.info 
I had an extremely poor experience purchasing a 24-hour-face clock from Franklin Instruments, and I would highly recommend your site visitors not purchase any timepiece from them. The first clock arrived and the second hand became stuck whenever the second hand was directly opposite the minute hand (i.e., if the minute hand was at minute 17, the second hand would become stuck at second 47). The company did not reimburse me for returning the clock to them. I asked the customer service representative to advise me when they received it, and of the UPS shipping number for the return clock. She agreed, then never followed up until I had sent two more messages. Finally, when the replacement arrived, the replacement clock became stuck whenever the second hand and the minute hand aligned (i.e., minute 17 and second 17). I voided the warranty by pulling off the plastic face and snipping off the ends of the second hand; for the moment, it appears that this may’ve solved my problem. However, the poor customer service and poor quality of the finished product lead me to believe this is a supplier which, if their experience mirrors my own, your site visitors would find only a source of frustration. I feel they would most likely have better luck elsewhere.
Oh — and I forgot to mention, they even sent the return clock to the wrong address, an address that doesn’t exist. Fortunately, I was able to get UPS to redirect it to the correct address!
Thanks for the info. I agree – best look elsewhere until they improve their product and service.
I couldn’t locate an e-mail address for the CEO, but did direct a complaint to the company via their comment form. If I receive any sort of response, I will pass it along to you.
Do you know where to get a 24 hour digital clock that isn’t expensive? Thanks.
Apart from the links on this page, perhaps you could look on eBay. I don’t think there’s an obvious model to go for. The cheaper ones aren’t very good, sadly.
Check out http://www.cruisingelectronics.com. They have good quality 24 hour digital clocks.We bought one for our campervan and one for our friend for his boat. Good backup service and they send overseas aparently.
I need to purchase an inexpensive 24 hour clock today 901 4853474 george
This isn’t a store where someone will get in touch with you; this is more like the equivalent of an article in a newspaper telling you about places where you can buy a 24-hour clock. Leaving this here is like asking the article’s “writer” to sell you a clock, so, no, it doesn’t work that way. Additionally, it’s not a good idea to leave your telephone number open like that on the Internet.
I sell in my Tindie store a replacement clock movement controller board that can be a sidereal clock (among other things). One purchasing option is pre-built 12 hour or 24 hour movements ready to be installed in the clock of your choice. http://store.geppettoelectronics.com/
You have no idea how many years I have been complaining about clocks with 12 numbers, when everyone in the world knows there are 24 hours in a day. I have no earthly idea why people want to keep using these antiques and why everyone is so dumb??
Thank you from the bottom of my heart for your website. This should be on the 6 O’clock news, worldwide. Even people who have no military background, or exposure, should be aware of the fact that there are 24-hour clocks being made by people with some intelligence.
Thank you! I have been looking for the clock face like Steve’s for a long time. I think it is the best one out there. I bought a 24-hour clock (made by Clark, that has a real 24-hour mechanism) from Sears for 15 bucks, and I am going to paste Steve’s face over the silly one that came with the clock.
I know when people see this clock hanging on my wall, they are going to asks lots of questions, and I want to wake them up to the truth about time 🙂
Thank you, again for your site, and I am going to share this URL to my world.
Coincidently, take a look at my website (http://outbreak.redshiftsystems.net/too-late.html), to see that I have been pushing “time” for some time now!
Awesome, thanks! Of course there’s much less of a link between 24 hour clocks and the military over here – history weighs a bit heavier. I think it’s funny that we still keep time with a system named after Roman and Norse gods…:)
The 6-o’clock news? Do you mean the 18-o’clock news?
I found a 24-hour clock that meets 5 of my 6 requirements listed below. A picture is here: https://www.mfjenterprises.com/Downloads/MFJ-105D/MFJ-105D.jpg
Requirements:
1) analog
2) 12 inches or larger
3) dark face with white marks and numbers
4) not too expensive
5) no weird or very ornate hands that make it harder to see the correct time
6) atomic.
Well, except for being atomic, the MFJ-105D meets the first 5 requirements.The quartz movement is fairly accurate and adjust about twice per year, once in 6 months, and the second at 1 year when I change the single AA battery.
List price is US$24.95 and it’s been on my wall going on almost 7 years. It’s available here: https://www.mfjenterprises.com/Product.php?productid=MFJ-105D
Hi,
I’m trying to find a 24-hour clock that also has a hand that shows the day of the week (Monday, Tuesday, etc.) There are scads of “Day Clocks” out there that also have 12-hour movements, but I can ‘t find one with a 24-hour movement.
Are these even made? Any ideas where to find one?
Thanks!
I’ve seen 7 day clocks (search ebay for “7 day clock alzheimer”) but I’ve never seen a quartz mechanism that has a day component…