Old Piece of Silvertone Metal Costume Jewellery - Anyone any ideas?

Hi All. I've been researching this piece now for weeks and am not getting anywhere so I'm hoping someone might be able to help. This is a piece that came from my aunt (in the UK) with other piece of 1940's / 1950's costume jewellery. Unfortunately no marks so no clues there. It's a silvertone / white metal piece that is decorated with flowers and leaves. It has a 'C' clasp with a fairly long pin. It consists of three tubes that narrow towards the centre. The back two are hallow all the way through so you could have something passing all the way through from one side to the other (a piece of material maybe?). Black when I found it but it has polished up well with a silver cloth - still some work to do but it's starting to look good. It measures 1.75 inches long x 0.75 of an inch in diameter at the widest part. If anyone has seen anything similar and know who, what, when that would be create. Many thanks