Ray, they are not imperforated coils. They have been cut from sheets. The edges are not cut straight (especially the bottom) and top/bottom edges are not parallel to each other. Either 408 & 409 or 481 & 482.
i found these in this old book that came from a estate auction. he had them stuck in the page with the 2 single marked 405 & 406. im just not sure how accurate his numbering is. cause he had a 11 marked as a 10.
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