Chronos doesn't do it. At least, mine doesn't.
Which chess clocks show the tenths during blitz?
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They do it. I own a Chronos. You just have to have it on the proper pre-setting.
I'm wondering if there are any other types besides the Chronos.
How is that possible? I don't see how there is space to show the tenth of a second on the display of the ZMF-II???
Ah gotcha! Good to know! Thank you very much! 
Bump!
I believe the longer Chronos only shows tenths of a second on one "blitz" setting which has a maximum base time of nine minutes and fifty-nine seconds and in which you can't set any increment or delay. It also shows the tenths of a second from the beginning of the game and having the tenths on from the beginning in, for example, a five minute blitz game is just distracting.
The shorter Chronos can be set to show tenths of a second once the time goes below one minute, forty seconds on any of it's four "blitz" settings, which have a maximum base time of 100 minutes and you can set increment or delay on these settings. If you set it to show tenths of a second, it will show, for example, one minute, twenty-nine seconds, and four-tenths of a second on the screen as "89_4". If you set it to not show tenths of a second, it will show on the screen as "1:29". I find the fact that the clock displays the time in seconds rather than minutes and seconds if you have the tenths turned on to be odd.
The VTEK 300 always has the option to show tenths of a second once the time goes below one minute all the way up to when the time goes below one hour. Seeing tenths above one minute is overkill and is just distracting. Also, if you turn the tenths of a second off and the time goes below one second but there are still some tenths of a second left, it will look like the player has run out of time since the display just shows "0:00" It would be better if the display showed "0:01" (one second) in this case, like all other clocks that I am aware of do, to make it clear the player still has some time left.
The Z-Mart clocks (the Tap N Set, ZMF II, and Zmart Pro) always show tenths of a second once the time goes below one minute.
In summary, I like the way the Z-Mart and VTEK 300 clocks do it the best since you can always set the clock to start showing tenths of a second once the time goes below one minute. However, I wish the Z-Mart clocks would allow the tenths of a second display to be turned off as I know some players don't like seeing tenths of a second at any time and I wish the VTEK 300 would show "0:01", not "0:00" in the scenario I described above.
I was wondering which chess clocks that are available show the tenth of a second during blitz? I know the Chronos does it but was just wondering if there were any other clocks that did it as well
Thanks for the help!