Understand common service stickers, precious-metal hallmarks and internal case marks found after servicing — and how much confidence to give them.
| Mark type | Typical meaning |
|---|---|
| Service sticker | Possible service channel / date cue |
| Metal hallmark | Fineness / assay information for precious metal |
| Internal workshop mark | Service history clue, varies widely |
A sticker does not prove every previous service was perfect. A hallmark does not authenticate the whole watch by itself. Missing marks also do not automatically mean a watch was never serviced.
• Fresh sticker on a clearly neglected watch with no supporting history
• Hallmark claims that conflict with the case material story
• Seller overselling a sticker as full proof of authenticity
What does a watch service sticker mean? It can indicate a service event, date or workshop channel, but it is not a complete service-history certificate.
What do gold hallmarks like 750 mean? They commonly relate to metal fineness standards, such as 18K gold contexts, depending on jurisdiction and mark set.
Is no service sticker a bad sign? Not by itself. Stickers can be removed, never applied, or never used by some workshops.
Can internal case marks show service history? Sometimes they provide clues, but interpretation varies and should stay conservative without documentation.