Caithness Glass Paperweight Pluto.  This is from the series Planets, set Three.

Height approximately 2 1/4" (5.5 cm), width 2 3/4" (7.5 cm).

This weight was produced in 1971 in a limited edition of 500, this is number 165.  The information is etched on the base.

Designed by Colin Terris.

There is a tiny chip near the top of the weight, only noticeable on close inspection, there are also some small scratches on the base.  Comes with Caithness box and Certificate, both in good condition.

Made in Scotland.