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Hairpin spring switches

Apple designed and patented their own clicky switch, hairpin spring. In most cases, these have a clear keystem. However, in the version of the Apple IIc keyboard with a vertical return key, a red switch was used.

Beyond Apple

Apple hairpin spring switches were rebranded by alterations to the moulds that replaced the Apple logo with the letter “G”. Such switches have been found in a Rhino Robots Keyboard Emulator, manufactured in 1989 or later. The same switches were also used in the Cybernetic Data Products KB-74, found with a manufacture date of March 1991. In the latter case, the hairpin spring is absent, presumably leaving a linear switch. Neither Rhino Robots nor Cybernetic Data Products appears to still be in business.