I found this 1943 C25 interesting with it's perfs only on the top and bottom. Knowing these weren't issued as coils, I was curious. A quick look in the back of my Scott's Specialized confirmed it as coming from a booklet, making it a C25a.

Not very well centred unfortunately, and sporting a hole top centre where someone appears to have pinned it to a board, but still deserving of a place in the album.
Thought it was interesting enough to show.