Shop Label
It can be so hard to glean history from a machine. A good shop label can both add to that history and even (when done well) add to the appearance of the machine. A few even have custom key legends!
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Adler Mod. 7
Thrust
Unsure

Adler Klein Adler No. 2
Thrust
In progress

Erika (S&N) Model 1
Folding, Italic typeface
Unsure

L.C. Smith No. 3
Long Carriage (14")
▶ YouTubeWorks

Noiseless Portable
Steel Platen, noiseless mechanism
Unsure

Smith Corona Secretarial 250 Office Electric
Cubic typeface, power return and backspace
Works

Underwood Standard Portable "3 Bank"
Very small, early portable
▶ YouTubeWorks

Underwood No. 5
First commercially successful visible typewriter
▶ YouTubeWorks