From Longman Dictionary of Contemporary Englishsepia photograph/printsepia photograph/printTCPa photograph, picture etc, especially an old one, that is dark reddish-brown → sepia
Examples from the Corpus
sepia photograph/print• Prominent among the pictures is an 1854 sepia photograph of Jonathan Pickering, the bewhiskered company founder.• My aunts seemed very far away, faded, sepia photographs stuck in some childhood album. 