The signature looks like "C II G" (although the image is rather small) - which would make it a Caithness Second. In this case it would be a "Florette", designed by Colin Terris and first issued 1985 "in many colour variations". This variation is one I have not seen before - and would therefore be pleased to get your permission to use your images on
ScotlandsGlass' Caithness Catalogue.