I had thought about this post and do remember seeing shells like this with the rivets. The auction has probably ended, but did it have a pointy or rounded B/O badge.

David

The b/o badges on the drumset had rounded corners. I believe ludwig started making these drums in the late 70's. This particular kit looks like it had the L-bracket tom-mount. However, I recently bought a book called Rock Hardware by Tony Bacon which showcases rock instruments and gear. It was printed in the early 80's and it has a lot of photos in the drums and percussion chapter of these rivet seam ludwigs. The kits in the book have super deep tom-tom shells and a pearl style tom-tom mount with big triangular mounting brackets. So I think this was kind of a transition kit between the 70's and 80's--still retaining some of the qualities of a 3-ply 70's kit but transitioning toward the hard rock super-sturdy kits of the 80's. Also, this was probably ludwigs contribution to the trend towards thick shells that other companies like slingerland and sonor were experimenting with at the time.