Description
Canada Stamp PB#597aiii – Polar Bears (1976) 25¢
(Pl. 3) Type II, OP2 (4mm), “siamese twins” variety
The variety #597aiii was removed in the 2023 catalogue, because it is not a constant variety, but a varying error caused by a colour shift. However, we have decided to keep this variety in our system as this is a very convenient way to preserve this nice interesting error!
