The coil waste stamps are an interesting topic.
I finally got around to scanning a 170 subject sheet of the Sc. 540 (type III, perf. 11 x 10) which I picked up last year and thought that as long as I'd scanned it, folks might want a look at it.

It doesn't fit into an album so it tends to be out of sight out of mind in an oversize archival box more suited to newspapers.
Some years before I acquired the #540 sheet above, I briefly had custody of a 170 subject sheet of #541. It was intact although stated as fragile with some separated perfs when I won it. The auction firm's shipping department did not anticipate the way their package must have been tossed about 'cause when I got it, the sheet had split horizontally into two pieces, as you can see. I returned it for a refund, but scanned it before sending it back. I do not recall what it went for next. I felt bad 'cause a philatelic rarity had suffered. I can't imagine there are many of these sheets left intact at this point.
