This is splendid charm it’s a vintage solid 9ct yellow gold Noah’s Ark, that opens to show animals inside.  
 
It’s very substantial at over 8 grams, and beautifully detailed. Inside you can clearly see a giraffe, a donkey and an elephant, so cute!  It's even large enough to wear as a pendant if preferred.
 
Fully hallmarked for Birmingham 1969
Comes with a jump ring ready to attach to your bracelet.