antique

aging (or ageing), mature

antiquated, archaic, dated, fusty, geriatric, medieval (also mediaeval), moldy, obsolete, outmoded, out-of-date, passé

old-fashioned, old-time, old-world, retro, vintage

durable, enduring, lasting, long-lived, permanent

ageless, hallowed, time-honored, timeless, time-tested, timeworn, traditional, tried, tried-and-true

classic, classical

prehistoric (also prehistorical), primeval, primordial

antiquated, moldy, obsolete

historic, historical, olden, traditional

old hat, outdated, outmoded, out-of-date, outworn, passé, superannuated

dated, fusty, moth-eaten, musty, stodgy

aged, age-old, ancient, antediluvian, fossilized, hoary, venerable

bygone, erstwhile, former, late, past

forgotten, remote

anachronistic