Vintage Ultraman Japanese Superhero oversized watch

Vintage Ultraman Watch - plastic dial with white face with Ultraman and star on the dial - The band is thick rubber printed with Ultramans, moons and stars and has a plastic buckle. Cosmetically in very good condition - no wear or stretching to the band holes so doesn't appear to have ever been worn. Needs a new battery but I couldn't figure out how to open the back to change it - I'm assuming it works. but even if it doesn't you aren't going to find another one like this! (10)