Dominica watermarks, 1908-1922
I have two copies of the 1 pence "red" from the subject issue. On each, the watermark is sideways (with no Scott comment about the watermark being sideways). But on one, the bottom of the crown (Scott watermark 3, multiple crown and CA) faces left; on the other stamp, the bottom of the crown faces right. Hence, one of the watermarks is "inverted."
Does anyone have British literature that would confirm the existence of an "inverted" watermark? If so, is there any price premium for being inverted?
My only other stamp in that set is the 2 1/2 pence "blue" with a sideways watermark with the bottom of the crown facing right.