Screw Back

TOOLS NEEDED: Case wrench, non-metal tweezers, small screwdriver, battery tester, cleaning cloth, screw holding tweezers, rubber-tipped opener, polishing cloth




STEP2 - Place the watch in the case holding vise. Clamp the watch in the case holding vise by opening the two halves of the block. Place the watch in the middle, and gently release or tighten the two halves so that they hold the watch firmly (2a).

If the watchband does not unbuckle or unclasp, separate the band by pressing down with the pointed tool to remove the spring-loaded pin that connects the band to the clasp or watch (2b).

STEP 3 - Remove the back. This is where there are many different tools out there to do the same job. Using the right tool in a correct manner will help you to not scratch up your watch.  We are going to show you the 2 most popular tools used to acomplish this portion of the task, the rubber tipped opener and the Jaxa type case opener (the most popular).

Rubber Tipped Opener 

 Place the rubber-tipped opener in the middle of the watch backPress firmly and turn counter-clockwise to remove watch back  

Jaxa Type Case Opener 

 Locate the wrench slots on the back of the watch and select the best tips to fit the slots.Place the Case Wrench metal tips in the watch back notches. Turn counter-clockwise to remove the watch back 

4a  4b 4c

STEP 4 - Remove the batteries. IMPORTANT: Before you remove the batteries, be sure to note which side is up. You’ll have to put the new batteries in exactly the same way. In some watches, the batteries are held in by small metal clips. If so, carefully follow these directions for removing the various types of clips:
SPRING CLIP: Lift up one end of the metal clip with the fine-point tweezers—it will come out. Then remove the batteries (4a).
SCREW-ON CLIP: Remove the screws with the small screwdriver (4b). Be careful not to lose them. Caution: Clip may spring out. Maintain pressure or screw may be ejected.
PERMANENT CLIP: Lift the outside edge of the battery out of its compartment with the small screwdriver (4c).


STEP 5 - Test the batteries. See the battery tester for operating instructions. IMPORTANT: If the watch has two batteries and only one tests “replace”, replace both batteries. If both batteries test “good”, there is something wrong with the watch. Refer to your watchmaker.

STEP 6 - Locate replacement batteries. Read the number on the old battery. Find the same number in the Battery Cross Reference Guide. Choose the corresponding battery listed in the Cross Reference Guide from the your battery assortment cabinet . 

 STEP 7 - Clean the battery compartment. Check the battery compartment for dirt and remove it. If you find corrosion, refer to your watchmaker.


STEP 8 - Install the new batteries. IMPORTANT: Be sure to test new batteries before installing. For tester setting, follow manufacturer’s instructions. Install the new battery(s) with the same side up as the one(s) you replaced. Remember, the
watch won’t work if the batteries are put in wrong.
SPRING CLIP: Place one end of spring clip in place and firmly push the other end into its slot (8a).
SCREW-ON CLIP: Place the clip over the new batteries. Hold the screw with the screw holding tweezers to start it in the hole. Tighten the screw (8b).

STEP 9 - Close the watch. IMPORTANT: If there is a rubber sealing gasket in the back of the watch, make sure it is lined up properly before closing back. Start the back by turning it clockwise with your fingers, then tighten it with the rubber-tipped opener or Jaxa type case wrench.

STEP 10 - Clean the watch. Gently wipe the watch to remove any fingerprints or smudges. 

STEP 11 - Reset the watch. Reset the watch and make sure it is working. In analog watches, if there is no second hand, observe the minute hand through a magnifying glass until you detect movement.