Oh this thread brought up a recent painful memory.
I have one bottle of vintage M7, and recently while browsing through an out-of-the-way bazaar came across a shop that had a dusty looking box. The batch code checked out and I bought it. I opened it right there, lo and behold, out came a clear glass bottle with a brown sticker! And a completely different batch code underneath. I took the issue up with the shopkeeper but to no avail. And to top it off, it wasn't even *real* reformulated M7, but a knockoff!
(and to top that off, I got mugged on my way back home, guy took my phone and all cash, but left the blasted refilled repacked knockoff!)
So I haven't had a backup yet, but I'm thinking about LIDGPH, it's really grown on me as a signature.
Maybe a tin or two of rive gauche as its dirt cheap.