20 complete sets of brass pocket watch winding keys, each set holding 14 keys numbered 00-12 to cover every common pocket watch size.
⭐ At a glance
📏 Each set contains 14 keys, sizes 00 to 12
✅ Covers virtually every pocket watch winding size
📦 Supplied new, boxed with papers — 20 sets included
✔️ Brand new stock, made in a vintage style
🔧 What it does & how to use
A pocket watch winding key is used to manually wind the mainspring and, on the correct calibre, to set the hands via the square-shouldered arbor found on the winding stem or hand-set arbor of key-wind/key-set pocket watches. Each set's numbered keys (00-12) correspond to different square sizes, so you simply match the key to the arbor on the watch in hand — ideal for collectors, repairers, and anyone servicing a range of vintage-style pocket watches without knowing every arbor size in advance.
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Identify the arbor: locate the square winding or setting arbor on the watch movement or stem.
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Select a key: try keys from the numbered set (00-12) starting with a size you judge close to the arbor.
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Test the fit: the correct key should slide fully onto the square arbor without excess play or force.
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Wind or set: once fitted snugly, turn gently to wind the mainspring or adjust the hands as needed.
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Store by number: keep keys sorted by their marked size for quick reselection next time.
