Descriptive palette
The vocabulary the guide uses for touch, sound, carriage, and feel — across every machine page and every filter chip.
The keystroke itself — how far it goes, how evenly it returns, how it feels under the pad of your finger. The most personal of the dimensions and the hardest to translate from one person's hand to another's.
What the machine sounds like in a quiet room. The factor most often cited as a buying consideration and the one a photo on eBay can't tell you anything about.
Often a single word's worth of attention and yet — when you sit with a machine for hours — its bell is one of the things you'll know best about it.
How the carriage moves across the platen — its glide, its return throw, its end-of-line behaviour. A surprising amount of how a machine feels to write on comes down to this.
How the machine sits on a surface — does it ground itself, perch, drift? An underrated dimension; a typewriter that moves under you is a typewriter you fight with.
What the machine looks like, by era and by finish. Less important than how it writes but worth its own vocabulary, because a typewriter sits in your space whether you're writing on it or not.
The half-anthropomorphic, half-honest way collectors talk about their machines. These are descriptors, not assignments — most machines are several of these at once, or none.