Hey Salcoton,
The Catholic Church does not recognize JW baptism as valid. There are only a handful that they do not recognize -- JW, Mormon, Pentacostal (oneness), and Seventh Day Adventist I think are the ones they don't.
There are several factors involved with JW baptism that bring it's validity into question, even if it was performed prior to the "organization" insertion.
At the time of my baptism (1967) the brother actually said the words, "I baptize you in the Name of the Father, and the Son, and the Holy Spirit" while I was in the water and just before he dunked me. However, our friend Tom Cabeen was baptized in the 1960s and he says that the words were NOT said over him at his baptism. So JWs were not consistent in their baptisms even then.
I was baptized Catholic this past March. It was an amazing spiritual experience --- quite a lot different from being dunked in a little pool in the basement of the Kingdom Hall.
Pax,
Ruth