Gucci Crest Charms
The Gucci crest charm is a gold-coloured hanging charm on the inside of the bag and depicts the Gucci shopping knight
These charms are nearly always clipped to the back of the bag often with a matching plaque stamped with Gucci ITALY. They go right through the 1960s/70s and '80s but many models of bag do not have them. Not all bag that have the charm have the plaque and vice-versa.
In the 1990s some bags have a round hanging zip-pull charm with interlocking Gs from a finer chain the Gs in a darker shade of gold than the background.
If you get offered one of these offered alone as a charm or a key ring, it has been unclipped from inside a Gucci handbag. They never sold them separately.
Note:
The leather horseshoe shape tab without the gold plaque plus the round GG zip-pulls (introduced early 1990s and were phased out mid-90s) unmistakably dates a bag from this era as unlike other markings these zip-pulls do not appear before or after.