Joe,
I am holding my copy of Shotgun Sports and looking at the article written by Nick Sisley, and I quote,
" The year was 1989. As I understand, the facility was sold. Real estate was going wild in Japan at the time. I believe the gunmaking facility was razed to construct a new building. As for the 100 partially made .410's on the 4/0 frame, Jack Skeuse continues to build them as time and experienced gunsmiths permit."
I have missed/been outbid on a couple 28/410's in auctions. Have never held one.(.410) I have a few 28's and find it hard to believe that a still smaller frame was actually made. Would love to see it.