I’d like to know what these 6 matching glass cups and saucers might be.

They are glass demitasse cups and saucers decorated with gold lustre and raised enamel flowers on light purple / mauve glass. They are unmarked.

The dimiensions are:
cups: 59 mm rim diameter; 43 mm tall;
saucers: 100 mm diameter; 23 mm tall.

I believe they were purchased by my grandfather (1875-1937) possibly while in the Royal Marines (1896-1908) or while in North Italy during WW1.