Token

cosmético

(merely symbolic, for appearance's sake)

simbólico

(merely symbolic, for appearance's sake)

favor

(something given or shown as evidence of good intentions)

ficha

(piece of stamped metal used as a currency)

muestra

(something given or shown as evidence of good intentions)

prenda

(something given or shown as evidence of good intentions)

recuerdo

(keepsake or souvenir)

seña

(something serving as an expression of something else)

señal

(something given or shown as evidence of good intentions)

símbolo

(atomic piece of data)