u/autonomouschair spotted a gorgeous Tandberg Data keyboard in the Oslo National Museum.
KBD.news Published August 12, 2022
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… saw this in the Oslo National Museum and now I need these keycaps – autohomouschair.
The caps resemble those of some Siemens boards. No wonder, according to this Deskthority wiki page Siemens STB switches were developed "to be used for keyboards by Siemens and its subsidiaries (esp. Tandberg)".
An alternative may be Devlin's Z series, and the profile also shares some similarities with the Triumph Adler caps we've seen on some contemporary boards: Fisk and here.