Beautiful decanter set.

Hi I have had this decanter set for well over 15 or more years I bought it from a car boot sale for £5 I was offered £25 for it there and then from another car booter but I wouldn't sell it did have the label on which has now come off but I know that it is Austrian Cyristal there are 6 glasses all have a bird engraved into the glass and the decanter as you can see has a little bird as its stopper, I would love to know more about it if anyone has any info it would be much appreciated...