heirloom-type words

Is there a word that indicates that something has been in the family, or in your own possession, for a long time? Sort of like "heirloom", but not necessary involving multiple generations nor even multiple people? For example, to distinguish a Christmas ornament you've had for ten or twenty years versus a brand new one, or one that you've only had a few years?

Perhaps a word for a quality an object obtains in increasing quantity with age and familiarity?
(and perhaps with or without fondness... there could be ornaments you've had a long time, which you've never been particularly fond of, or not as fond of as others.)

Sometimes there are objects I've had a long time, but don't remember having gotten, so they are low on familiarity - like when you find something in the back of a drawer you must have bought some time ago and completely forgotten about.