Select Voltage:
Add to Wishlist


Clocks are constructed for easy installation in a wide variety of replacement applications for home builts. The rugged quartz movement is accurate within 2 sec. in 24 hrs under normal operations and runs accurately in temps from -30 to 180F.


  • 2-1/4" OD
  • 2" Depth
  • 4 ounces
  • Customers Also Viewed
  • Frequently Purchased With


clock is in and works fine I wonder with future up grades should I installed it.

Gary B
July 1, 2020

Mine has been running since October 2017. I reset for daylight- standard time, otherwise it stays within a minute.

David V
January 7, 2019

very happy with looks and time keeping reasonably price and well constructed

John S
May 10, 2018

I wanted to wait a week or two to review the clock to make sure it kept working. My luck was much better that the previous reviews. Clock arrived quickly and well packaged. Change out of my old quartz clock was straight forward and replacement took about 20 minutes. So far Iâm very pleased!

June 1, 2017

Mine quit working after six years. Now, I have to decide if I want to buy another one. If I buy a different clock, I will have to change the connector, and thats a hassle to get to at the top of the panel with hardly any room for my hand.

Russ M
August 23, 2018

Mine worked for three years...

Dwain I
March 28, 2018

clock worked for 2 hrs then stopped then started for a day then stopped. replacement is being installed. not sure if problem only on 28v. clock says 28v.

Peter L
August 26, 2017

This is a very expensive clock. We installed 2 before we got one to work and it didnt make it a year. Now we have to remove this and install something different. So Im out the price of this clock plus the new clock and the time Ive paid my A&P to install 3 clocks.

June 12, 2017

I did better than Al., my clock went for 10 minutes, thats it. Stay away from this clock.

Jon A
March 25, 2017

Two out of two units defective straight out of box. They would not run! What a waste of effort, time, and money. Stay away from this clock.

October 11, 2016


Q: What is the size of the Quartz Electric clock?

This clock fits in a 2-1/4" hole and has a depth of 2 inches not including wiring.

Q: How much does this clock weigh?

The clock weights about 4 ounces.

Q: What is the draw on the battery of this 12V Quartz aircraft clock? Part # 10-22812

Per the supplier: 10-11 Milliamps.

Q: Is the Quartz Electric Clock lighted and who is the manufacture?

No, it is not lit and is made by Instrument Services Inc.

Q: Is this Quartz electric aircraft clock Approved for certified airplanes?

Per the manual, "This clock is to be used as a time indicating clock only. It is not to be used as a flight instrument and or warning instrument."

Q: Is the wiring included with the quartz aircraft clock, part # 10-22812?

Yes, the wiring is included in the box.

Q: What is the current draw of the clock?

Per the supplier: 10-11 Milliamps is the current draw on this unit.

Q: Does it require a notch in the panel for the setting stem?

Yes, there will need to be a cutout to allow the stem through the panel.

View in Catalog

View Image View in Catalog