I just restored in working condition my father's Ericsson T10s! It has a custom black shell (hence the “T10sc” label) and it's certainly used, but in very fair condition for its age. :
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Ericsson t10 s
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File:Ericsson T10s.jpg - Wikimedia Commons
Teléfono móvil Sony Ericsson T10 second hand for 10 EUR in Montblanc in WALLAPOP
Ericsson t10
Vintage Ericsson T10s Mobile Phone, Hobbies & Toys, Collectibles & Memorabilia, Vintage Collectibles on Carousell