...well, I've had this Hamilton Electronic under the microscope and still can't determine how to open the case and replace the weakening battery...

...a look at the back...appears to be sealed...

...a view of the side as well...any ideas?

Jim maybe it comes out by removing the crystal ,or is it a water tight crystal..

Hi Jim, wish i could help you.Most of the wristies i have seen are screw back cases.But i am a real newbie when it comes to wristies.Maybe someone like Dave Freeman can help you. Sorry.

...thanks Samie, Kevin...yes, I believe the crystal would have to be removed in order to access the movment in what otherwise appears to be a sealed case...the problem is how is the crystal removed and then how is the stem removed in order to remove the movement?...I 'member now that I bought this 'piece from Rich Kuhn maybe he knows...

Jim, If you want to throw that away, just put it in an envelope and I will throw it away for you

Jim is the crystal glass or plastic ,,,a lot of these you have to use a crystal lifter to remove the crystal (if it,s plastic)..probaly has a 2 piece stem if so it will slip right out the front ,may have to turn the stem a little to get it apart...

For the most part i work on the mechanical watches but have replaced battery,s in a few battery operated watches...

Wait till you hear from a few more people before you tackle it,,not having the watch in my hand i might be wrong about this..

Samie

This might be one of those cld watch cases Hamilton used. If that is the case, there should be a lip on the bezel at eh 12:00 position. The bezel should be removed with a case opener, and then the crown should be turned so that the two piece stem will allow the movement to drop out when the case is turned over.

Jim,
to install a new battery you need to remove the movement from the case as follows:-

* Pull out and remove the winding stem. It's a split stem so be carefull.

* Remove the crystal with a crystal removal tool.

* Remove the movement to get access to the battery.

After battery installation re-install all the parts in the order you took them out.

If in doubt go to a jewellers shop which has the correct tools or send your watch to Rich Khun.

Dave has the right method but I'd remove the crystal first and then rotate then crown with the dial down. The movement may just drop into your hand.
-Cort

...thanks to you all!...now off to eBay to find a crystal removal tool...