Imperial Glass began making their carnival glass versions of the Windmill pattern in 1912. This slag glass piece has the superimposed IG mark located inside bottom indicating it was made after 1951. Imperial reissued this pattern in various colors from the time of initial production until closing shop around 1984. The pattern includes a windmill scene in two panels and a fishing scene in one panel. This is the smaller version, which is 6-1/2" to top of ice lip by 4" wide
OMN: #514 Windmill
YOP: 1912 in carnival glass
MFG: Imperial Glass Co.