The late 70's concert toms with the angular cut shells for outward projection?

I don't think they were available long. They were in the '79 catalog. There probably aren't a lot of them since concert toms started falling out of favor by '79. I think they were much more popular as marching band drums (lighter and projected outward instead of down). I think the concept of using them with a drumset was an afterthought. I've never seen an actual kit in the flesh. Post pictures please. Us Singerland nuts would love to see what you've got.