Need to know what battery is needed for Gucci 1500L.

That would be a surefire way to ruin a beautiful and very expensive watch.

https://www.fixya.com/support/r27181038-changing_watch_batteries

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How to Change Gucci Watch Battery LEAFtv ..not sure if this site will help you out its all i could find.

Any watch maker should be able to tell you what battery is needed and/or replace it for you.

Ensure the watch battery is dead. A Gucci watch is not exactly a cheap trinket, thus the battery should have a fairly long lifespan before requiring a replacement. Once you see the hands of time stop on the face of your luxury item, you can be sure it is time to purhase a new battery. The typical cost for a new battery starts at $50. There are three categories for a Gucci watch: Automatic watches, quartz watches, and bracelet watches. Depending on the type, you will need a battery that suits one of these classifications. Batteries for Gucci watches can usually be obtained on any discount/surplus website (e.g. eBay, batteryright.com, or the actual Gucci store).
Read more : http://www.ehow.com/how_4966607_change-gucci-watch-battery.html
http://electronicshelponline.blogspot.com/

Sorry took so long. Here is a link to GUCCI and the last page has where you can send your watch in New Zealand.
Best regards.

http://media1.guccitimepieces.com/pdfs/i-gucci/I-Gucci_Warranty_EN.pdf

Unfortunately, the only way to get the part is from Gucci directly. Here is the link: http://www.gucci.com/us/us-english/us/about-gucci/legal-notices/assistance.html

the battery type should be written either on the inside or outside of the cover, or google up that model watch and find out online