M0110 & M0110A 128k, 512k, Plus
M0110 was the first Macintosh keyboard and used Alps switches exclusively. M011A is the extended version that came out for the Plus. Switches can be either Alps or Mitsumi.
Caps lock switch is sold separately and is NOT interchangeable between Alps and Mitsumi because they are different heights.
There is also a non movable post on a switch base to aid as a guide for the Return key on the extended keyboards.
The space bar spring, space bar stabilization bar, and stabilization bar clips are also available here.