So, does this fit?
- [wiki]Cherry KXN3-8451[/wiki] ca. 1984: uses cylindrical prism as expected
- My Cherry MX Blue switch from the Keyboard Company, bought in 2013: uses cylindrical prism — Keyboardco affirm that they could have been older stock
- My [wiki]Cherry MX Dark Blue[/wiki] switches from an unknown source: cylindrical prisms
- [wiki]Artistotle Yellow[/wiki], from a 1992 Chicony KB-5191 — new prisms … uh oh …
My other Cherry switches seem to have newer prisms, including the black MX-M8 Adapter switches that I figured would be much older.
Does anyone have any additional evidence to affirm/deny this claim?