[rehevkor5]

This Speak & Spell simulator: https://sha.nnoncarey.com/

The only one I've found that's as accurate is the emulated version at https://archive.org/details/hh_snspell But mine also has two expansion modules to choose from :)

[bombcar]

I'd love to see a piece of hardware like this that you could reprogram easily; or the spin-and-say or whatever it was.