It is battery operated, so it will stop after a few years, but if you replace the batteries when that happens, it will work fine. The watch is not waterproof, so please be careful not to expose it to water.
Please be careful with water as it may get into the watch when washing your hands under the faucet, etc. This is a very rare item. International Buyers - Please Note.
Thank you for your understanding. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\Japan\Other Japanese WWII Orig Items". The seller is "no_spe-94" and is located in this country: JP. This item can be shipped worldwide.