On the left side, we will be removing this lever.

It is held on its shaft with a retaining clip and a washer. The clip is actually just what appears to be one loop of a thick spring. Find the gap in the wire, then use the dental pick and a very small screwdriver to pry apart the gap enough so that you can remove it with the needlenose pliers.

Don't worry about bending or breaking this thing. I think in the rebuild we'll replace these with retaining rings.

Retaining rings hadn't been invented by the time these calculators were built. The Seeger retaining ring was invented in Germany around 1927 by Hugo Heiermann.

Remove the washer (5/16" outer diameter).

Also unhook the end of the spring from its post.

Place retaining clip, washer, and lever into bag 7.