A jam jar is the only label addressed to someone else
A preserve label reading NO 7 OF 9 isn't for the person who made the jam. It's there so whoever opens it knows eight other people got one too.

One small oval label, drawn large, edges slightly torn. DAMSON. SEPT 24. In the corner, smaller: NO 7 OF 9. A faint ring of syrup sits at the bottom edge, where the jar has been picked up and put down a few times since it was filled.
Nobody numbers a jar for their own benefit. NO 7 OF 9 is written for whoever's about to open it.
What is this label actually telling the person who reads it?
That they're one of nine, not one of one.
DAMSON and SEPT 24 answer the obvious questions — what's in it, and when it was made. NO 7 OF 9 answers a question the recipient wouldn't have thought to ask: how many other people got the same jar. A jam label is usually read once, quickly, before the lid comes off. This one has already told you something about the year the fruit came from before you've even opened it.
Why number a run of jars instead of just dating them?
Because a date tells you when; a number tells you how much, and how much is the harder thing to picture from one jar alone.
Nine jars of damson from one September means a tree, or several trees, produced enough fruit that somebody had to decide who got one. The number on jar seven is a small piece of arithmetic made visible on the outside of the jar — it's evidence of a decision about distribution that happened entirely off the label, at a kitchen table, probably with a list of names.
What makes a preserve label worth printing over the jam itself?
The parts a printed label from a shop would never carry: the torn edge, and the handwriting doing the counting.
A bought jar's label is designed to sell the same jam to a thousand strangers, so it says nothing about who it's for. A home label with a hand-numbered corner is doing the opposite job — it's naming one specific recipient out of a small, known group. The syrup ring at the bottom is the same kind of detail: proof the jar has actually travelled from a kitchen counter into someone's hands.
Who owns the words on a jam label like this?
Nobody owns "damson" or a date, and nobody owns the idea of a small oval label with torn edges.
A preserve label naming a fruit and a month is about as generic as food writing gets — there's no recipe here even being claimed, just a fruit and a season. What would actually belong to somebody is a real shop or maker's printed identity: a named producer's mark, their typeface, their estate. This label carries none of that. It's a private jar, made for nine people who already know each other.
Does the numbering work for jars given outside the family?
Yes, and it arguably means more there — a numbered jar tells a friend or neighbour they're one of a small, deliberate group rather than an afterthought.
Inside a household, everyone already knows roughly how many jars there are. Outside it, the number is new information: jar seven of nine tells the person holding it that eight other households, somewhere else in the same town, are eating the same September. That's a fact a plain "damson jam" label could never carry — a tea merchant's ticket makes a similar admission about who a blend was actually made for, just about water rather than fruit.
Isn't a numbered label a bit much for home-made jam?
Only if the number is decorative rather than accurate.
Numbering nine actual jars is arithmetic, not presentation — it records something true about how much fruit there was and how it got split up, the same way a pickling crock's tape records a brine strength and a date rather than an opinion about the cucumbers. The label isn't dressing the jam up. It's telling the truth about how many of it there were.
Does it print well?
Yes, kept small and precise rather than blown up to fill the chest.
An oval this size reads as a label because it stays label-sized relative to the shirt, with the torn edge left irregular rather than smoothed into a clean ellipse — a hard, even oval would read as a printed sticker rather than paper that's actually been handled. Cream on a deep red ground keeps the DAMSON and the date legible without needing more than two colours.
How do I get one made?
Describe the jar at JustOG — the fruit, the date, and how many were made. Pick a direction, drag the crop frame, see it composited on the real garment, and it's made to order and shipped.
Designs other people have published are in the shop.
Seven of nine. Somewhere, two jars haven't been opened yet.