Neapolitan Duo

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Neapolitan Duo, two Italians (male) who look like twins and say they are, might have camouflaged the billing and gotten a surprise, as they look and sing just the same. As it was they sang one by one and then together, just fair, with homemade voices and street-singer clothes.  
Source:
Variety Magazine, LVIII: 10 December 1920