"Carlo Ponti (1823–1893) was a Swiss-born optician and photographer from Venice.
Carlo Ponti was born in Ticino. He was optician to King Victor Emanuel II of Italy and inventor of megalethoscope, a viewing device for photographs and its larger version the alethoscope." - (Wikipedia (en) 21.07.2018)
"Carlo Ponti (1823–1893) was a Swiss-born optician and photographer from Venice.
Carlo Ponti was born in Ticino. He was an optician to King Victor Emanuel II of Italy and inventor of megalethoscope, a viewing device for photographs and its larger version the alethoscope." - (Wikipedia (en) 10.08.2021)
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