Portait of a Lady c.1630 Need help IDing a pic

Visited my home town this past summer and in the Art Museum (used to be my Elemenenty School) theres a oil painting of a Lady and it states artist unknown but its thought to be from around 1630. Also states they believe it to be altered and someday hope to ID it for what it really is. They say a crease in the hand area leads them to be there night be something underneath it. The museum is very small and just barely is funded so they cant afford to send it out for a expert to help them. anyone care to help with taking a look at a picture I took of it while I was home to see if it can be IDd?

Mahalo (thanks)
Jeff C