Item no lem984.
The so-called window spacing between the glass.
Manufacturer, Riihimäki glass. Year, 1940's.
Height 12.5 cm, diameter 6 cm.
The weight difference in the glasses.
Glass is an intermediate glass that is meant to collect moisture between the outer and inner windows (wool or lichen..

Item No. lam64. Drinking glass. Manufacturer, Riihimäki glass. Height 9 cm, diameter 5.5 cm, weight 112 g...