https://www.facebook.com/groups/251306619987488/posts/1518913049893499

Andrew Bradshaw created reproductions of Hermes platen knobs in metal using his lathe.

Olympia SG Typewriter Platen Knob Shaft Bent, Repaired, Straightened<br /> by [[Duane Jensen]] of [[Phoenix Typewriter]]<br /> accessed on 2025-08-18T08:17:57

https://www.thingiverse.com/thing:7028076

via https://www.reddit.com/r/typewriters/comments/1ke4xfw/3d_printed_underwood_standard_portable_4bank/