Charlton says that the composition of 1997 1 cent in MS, PL, and SP is copper-plated zinc, 2.25 g.
The spec cards in the sets say that it is bronze, 2.50 g.
Which one is true? I think they are bronze.
But 1 cent coin in some Winnipeg sets has a suspicious reddish tone which is characteristic for copper plating.
I could weigh the coins to find the answer, but I don't wont to destroy the PL sets. Maybe someone already knows the answer or has the loose coins and can check the weight.
On a similar note, Charlton says that 1 cent specimen for 1998 to 2000 is copper-plated zinc as well. I am pretty sure that this is a mistake. The specimen coins are bronze. And from 2001 they are plated steel, so no specimen was ever made of CP Zinc.