Unidentified Canadian signal
Elton Gish has attributed this to Canadian origin, but the actual manufacturer is still unknown.
Characteristics:

Color(s)
--- white

Pinhole(s)
--- glazed

Pinhole Top(s)
--- flat

Fire Rested
--- petticoat

Wet/Dry Processed
--- wet

Marking(s)
--- ink stamped on skirt "919"