Just an update, I have decided to take the pendant back I feel a bit weird about the lack of markings (and without wanting to sound snobby, when you spend £xxx on a Tiffany pendant you kind of want it to look as if it does actually come from Tiffany! ). I'm going to take another look at lunchtime at the Metro horseshoe in WG or RG, or maybe one of the YG keys to layer with my DBTY...