Watch is super fun and would have been sold in erotic magazines back in the day. I know the watch was sold under multiple names including Hard On. Watch is running and is keeping time well considering the age.. Watch could probably be tightened up by a watchmaker but movement is similar to the ones used in timex back in the day. 

Im asking $125 Shipped to you!

Photos: https://imgur.com/a/DYqc0Xy

Timestamp: https://imgur.com/a/D1KKsWJ