It seems you're asking about a "Ciprini pocket watch". However, there's no known watch brand with that name. It's possible you're misremembering or misspelling the brand name.

To help you, could you please tell me:

* What does the watch look like? Can you provide a picture or describe its design, materials, and any markings?

* Do you know where you bought it? This could help narrow down the brand.

Once I have more information, I can hopefully guide you on how to change the battery.

If you're unable to find the brand, it might be helpful to take it to a local watch repair shop. They should be able to identify the watch and help you with the battery change.