The replacement screws have arrived - the thread needed is indeed M3.The 16mm length I ordered was too long, but they didn't foul anything inside when I tightened them.

But the heads of the modern standard cheese-head screws don't stand proud enough when fully screwed in to secure the thin, bendy metal lid properly - there's a reason why there's a shoulder on the original screws. And they're bright, shiny steel, unlike the blackened originals.

At the moment I've moved the two remaining original screws to the front to engage with the rotating catches on the lid, and put the new screws in the back not fully screwed in And I've ordered (from China  ) two M3 threaded spacers. The shortest ones I could find on eBay were 4mm, so we'll see if they're short enough to fit in the holes in the lid.

Next update when they arrive.

Yes, honestly. When I type a character on the middle row of my just-received Ghia (blue, very retro) a few of the keys on the bottom row vibrate from side to side.

Is this normal, or is my new machine in need of help?

My early Hermes Baby (visible ribbon spool type) is missing the two screws at the rear that both help hold the machine on to its base and locate the lid when putting it on. These screws have a threaded part, then an unthreaded part, then a slotted cylindrical head which fits into holes in the metal lid.

Anybody know where I could find replacement or equivalent screws?