Really unusual antique barometer and compass pendant, modelled in 15 carat gold, compass one side, barometer the other. 
The barometer and compass are both working - I put it out in the sun and the mercury shot up.
The compass dial is a lovely irridescent blue.
 
I can add a large jump ring for £100
 
weighs - 14.9g
measures - 25mm diameter
condition. The back of the compass dial has a few rust marks
English circa 1880