A number turns an object into a particular object.
Every bottle in a line is the same bottle. That is what a line means. Then it is given a number, and it is no longer the same. It is the third. It is the one hundred and twelfth. It is the one that was made on a particular day.
Numbering is an old habit. Prints are numbered, and watches, and the first copies of books. We number what we want to be able to find again. We number what we expect to be asked about.
A number is a promise that someone is keeping a record.
The number matters less than the record behind it. A number on its own is decoration. A number that leads somewhere, to a day, a batch, a person, is a fact.
This is why the record has to be real. A number that leads nowhere is worse than no number at all. Owners notice. People who care about objects check, and they are right to.
Consider how a numbered thing is received. A bottle without a number is something one has bought. A bottle with a number is something one has been given a place beside. The water is the same, but the relationship has changed from a purchase to a custody.
A number can be printed, engraved or written by hand, and each says something different. Printing says it was planned. Engraving says it was meant to last. Handwriting says that a person was there.
There is also a small pleasure in it. To be given the fourteenth of anything is to be given a place in a sequence: small, exact, and held by no one else. It is not a ranking. A number says “this one”, not “this is better”.
Collectors understand this instinctively. They keep the certificate with the object, and the object with the certificate, because each proves the other. Take one away and the remaining one is only half as persuasive.
Scarcity is often announced with adjectives. A number does the same work more quietly. It states how many, and leaves the reader to draw the conclusion.
It is worth remembering that the oldest numbered things were not ornaments. They were records of grain, of cloth, of debts. The habit began as honesty. It became a mark of value only because honest records are rare.
It also asks something of the maker. Whoever numbers a thing agrees to be asked about it later: when, where, by whom. That is a heavy thing to agree to, and it is why the practice is not common.
A small thing, then, but not a slight one. The number is the visible end of a long chain of care, and the owner is entitled to follow the chain back to its start. If the chain is there, the number is a pleasure. If it is not, the number is a decoration, and people who notice details are quick to see the difference.
When we number a thing, the number should lead somewhere. We would rather number fewer things and keep the record properly than number everything and keep nothing.