Calvin Klein snap-on back won't come off?

[PeteG]

Hi all. A quick query to start off with - my son has a Calvin Klein K9R 31C wristwatch which needs a new battery but I can't seem to get the back off of it. It appears to be a snap-on back (i.e. no screws or circular notches) but has no notch for a lever-style removal tool either, so I'm just checking I've not missed something else and might break something if I force it? Thanks

[clockboy]

Hi Pete welcome to forum. Enjoy. It would be best to post a picture  of the case back and side view of the watch for definitive answer. 

[LittleWatchShop]

Looks like a snap back to me. One method is to use a safety razor blade to slip between the case back and case, working around while prying.

[watchweasol]

Hi as it is a fashion watch it’s more than likely a snap back, some of which can be very tight. Once you have changed the battery you then have the problem of replacing the back, you will need a press.  There are tools on the eBay to open and close snap backs whose cost is not that great and handy to have if you are working on watches.   Cheers

 

[LittleWatchShop]

@watchweasol makes a very important point!!  Here is an example of a case back closing tool.  Be careful to choose the correct die size when closing in order to avoid breaking the crystal or other damage.

[Kalanag]

Snap-on for sure!
 

Edited January 16, 2023 by Kalanag

[clockboy]

Kalanag is spot on a snap back for sure

[PeteG]

Yes it was a snap-on, it came off reasonably easily but only after I'd invested in some better back removal tools, and went back on ok with the aid of a proper press, definitely worth getting particularly for physically larger watches I think. You may have guessed I'm reasonably new to the intricacies of serious watch work but all of a sudden I'm quite popular with family members whose watches have been languishing in drawers unworn due to dead batteries!!

[watchweasol]

Hi well done. At least the tools will be put to good use and not be an ornament.  

[Paul80]

One thing tobe careful of with these snap back watches is that sometimes to improve the waterproof seal they sometimes use a what looks like thin nylon gasket, these I have often found to be a one shot item that will need to be replaced along with the battery. Trying to reuse the old one only ends in tears.