Great find! Your dark cones are correct. (Kenrick has some oddball customized speakers.) The Velcro strips around the horn show that they used to have lenses.
Telling the wife that they are an investment is probably accurate. Every morning for years now, I have surveyed JBL prices on eBay. I get a report in my email as the sun rises. My 4435s have more than doubled in value since I got them. My L100s, 4311s, 250Tis and 4430s all appreciated dramatically, too. And all the blue-faced large-format monitors have climbed in value dramatically over the past five years or so. I wish our financial investments would do even half as well. Fixing them up, and veneering / painting the gray one, should be a no-brainer.