Dahlke envelope
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English[edit]
Etymology[edit]
After its designer Benjamin Dahlke. In use in the late 1920s, the name was patented in 1929.
Pronunciation[edit]
Noun[edit]
Dahlke envelope (plural Dahlke envelopes)
- An airmail envelope with a distinct pattern of spaced diamonds in alternating red and blue colours around the outer edge.