Swatch vinrage Gent Jelly Fish (GK100) watch.

The watch features a transparent case and strap, showcasing the internal movement.

It was originally released in 1985 and became a classic of the Swatch brand.

The specific model is the US version (GK100RE), potentially from 1986, identified by its thinner hands compared to later versions.

There is yellowing of the clear plastic. common for these vintage models and can indicate age.
Needs a new battery