Hi all again.
In conjunction with the two Pencil faceplates I posted for sale in another message, I'm also selling my Longworth chuck made by Lloyd Johnson at Woodturner Pro. I don't recall if this is polycarbonate, acrylic or what, but I can find out if it's important. It fits a 1" x 8 thread spindle and measures 9.5" in diameter - I used it on my Delta Midi/Mini. I just looked at Lloyd's website and apparently he's no longer making these... I'd like to get $30 and I'll cover the mailing costs in the lower 48.
Here are a couple links to articles on Longworths:
It's seen minor use over the couple years I've owned it - but overall, it's darned clean. I've ended up vacuum chucking most of the turnings that would utilize the Longworth. I'll include new rubber "grippers" though they aren't in the picture: