Is there any classic perfume not been tampered with???

[Deathraystare]

I know some of the greats such as Chanel/Dior/Guerlain have changed the formulas. Does anyone know of any of the ilk that are still the same?

Where can you find this out? Shalimar still smells the same to me...is it because they're eliminating certain ingredients due to animal cruelty issues?