The only true way to know that I'm aware of is this: The serial number on a real Dupont lighter is hand stamped, number by number and so the.

Lighter

It's hard to tell the age exactly, only ST Dupont themselves might have some sort of serial number registry, but they're not very responsive to most inquiries. You can tell from the flame height adjuster that it's a newer ligne 1, and not the older style. That said, it has to be made after 1965. The design looks a bit dated, and that said it's probably no newer than the 80s. So probably somewhere between 65 and 1985 would be my guess. It's definitely repairable.

The newer style ligne 1's all are. Whether you could repair it yourself or not all depends on your skill level and what is wrong. It probably needs all the seals/gaskets replaced at the very least. You'll probably have to take it apart to even have a better idea of what's actually wrong.

Generally most authorized ST Dupont repair places will probably charge you $60-90 to fix it, but in my experience most can be fixed if you're willing to spend the money. I will try to contact Dupont once more and see if they have this registry. I live in the Netherlands and the nearest official repair centre is in Belgium, at Dupont themselves. And they are not very responsive indeed. All the local stores also keep refering me to Dupont, not very helpful. Anyway I'm going to take the lighter apart and see if i can find anything wrong in there by myself.

Barsaat 2005. If not I will try to find someone at Dupont's who DOES speak proper English or Dutch. I am definitely willing to spend the money because it was my grandfathers lighter. I'll get back on this and thanks for the help!

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