Glassblowing at Mineral Point

I’m thinking August, 1975? Photo by Mort Bortin?  Babs? Meg? Jan Norberg, perhaps?

For extra credit:

• What's that footgear? I can't remember.
• That's a lot of hair, boy.
• Dig those aviator shades.
• T-shirt:  Silkscreen print of a T-Rex saying "tweet" in a word balloon.  Borsten Enterprises, ca. 1970