One of the most unusual set of stamps ever issued is this set from Bhutan. It was issued in 1973 and each of the seven stamps is a plastic record that can be played on a phonograph. Each record contains folk songs and folk tales. The stamp denominations are:
9 Ngultrums (Yellow Stamp)
8 Ngultrums (White Stamp)
7 Ngultrums (Black Stamp)
3 Ngulturms (Purple Stamp)
1.25 Ngultrums (Blue Stamp)
10 Chetrums (Red Stamp)
25 Chetrums (Green Stamp)
A complete unused set sells for between US$400 and US$600 on Ebay. Record stamps that have been postally used and cancelled on envelopes sell for between US$150 to $300 on Ebay.
Thanks to Stampboards.com for the picture.
Thanks.
Mike