(dated) chervonets (former currency of Russia)
a ten rouble banknote or gold piece
(colloquial) ten of any currency
ten-ruble note, chervonets (historical gold coin)
Он нашёл старый червонец в шкафу.
He found an old chervonets in the cupboard.
Дай мне один червонец на хлеб.
Give me one chervonets for bread.
Дед хранил червонку как память о прошлом.
Grandfather kept the chervonets as a reminder of the past.