The definition of an heirloom tomato is vague, but unlike commercial hybrids, all are self-pollinators that have bred true for 40 years or more.
en.wikipedia.org These were believed to have their own "mana", were handed down as valuable heirlooms, and often given as gifts to seal important agreements.
en.wikipedia.org Common items for exemption include clothing, furniture, appliances, motor vehicles, medical and dental aids, a home, family heirlooms, and some insurance.
en.wikipedia.org Heirloom seeds can be easily collected and will continue to show the traits of the original seed because this family of tomatoes almost always self-pollinate.
en.wikipedia.org Claimants have been detected in other countries, and he has even figured as a contested heirloom, appropriated to various competing national or ethnic identities.
en.wikipedia.org