This watch has been around since before I was born. I don't see it on the market, so I think this is a one-of-a-kind item. For those who collect Sat-chan items, please take a look. It's deteriorated. The back cover is easily detached. Operation has not been confirmed. Please consider this a junk item when purchasing. Please understand that this is a junk item and no returns or refunds are available. Please read the comments and purchase accordingly. Great for collections, etc.