Lots of vintage Fiji cowries uncovered in attic - photos - anyone help..?

[Bluegroove]

[img width=640 height=302]http://i271.photobucket.com/albums/jj136/wom_biddum_biddum/cowries.jpg[/img]

These were in our attic - collected by grandad when he visited the Fiji Islands in the early 1960s. I've photographed them next to a tape measure so you can get a rough idea of the size. They seem to be in absolutely fantastic condition.

We wondered if anyone could help us identify them? After initial explorations online, we think the top left one may well by cypraea schilderiana; the one next to it cypraea mauritiana; the next two possibly tigris... after that we've no idea!

Grandad's not well now and wants to sell these and other possessions he's accumulated to pay for medical treatment and some semblance of a comfortable life - it would be lovely if one or more of these was worth something! All your help much appreciated, thankyou very much.