1.  old-timer(n = noun.person) old hand, old stager, oldtimer, stager, veteran, warhorse - an experienced person who has been through many battles; someone who has given long service;
is a kind of expert

2.  old-timer(n = noun.person) antique, gaffer, old geezer, oldtimer - an elderly man;
is a kind of graybeard, greybeard, methuselah, old man