Knurling on 2004 to 2022 circulating Canadian coins
By castor | Tuesday, 29 January 2019
Last update: Mai 2023.
Since 2004, Royal Canadian Mint issued 19 circulating coins with different colored design for several denomations.
This article illustrates my observations as a collector who wanted to know more about who it's made. It isn't meant to be technical or scientific. By looking at the coins, which the color has been removed, we can see the changes that were made over the years.
The color
From 2004 to 2011, it's possible to see a transparent vernish-like substance near the color. Here are 4 examples of this.
How the color was applied changed in 2015.
Under the color
Pictures of knurling below are made with a 200x zoom. Because of its engraving characteristics, the 25 cents 2010 - Poppy circulation coin is unique.
25 cents 2004 - Poppy
First colored circulating coin produced by the Royal Canadian Mint.
The design of the poppy is under the color. Round convexe knurling.
25 cents 2006 - Breast cancer
Square convexe knurling.
25 cents 2008 - Poppy
Square convexe knurling.
25 cents 2009 - Men's hockey
Square convexe knurling.
25 cents 2009 - Women's hockey
Square convexe knurling. Red arrows show the design difference between the colored and normal coins.
25 cents 2009 - Cindy Klassen
Square convexe knurling.
25 cents 2010 - Poppy
Unstructured convexe and concave knurling.
Two dots varieties.
25 cents 2011
25 cents 2012-2013
25 cents 2015 - Flag
Knurling dots became closer. Square-shapped base with flat round top. Took more time to remove the paint while soaking in acetone.
25 cents 2015 - Poppy
Square-shapped base with flat round top.
25 cents 2017 - 150 years
Square-shapped base with flat round top. Took several hours, instead of 5 to 15 minutes, to remove the paint in acetone.
2 dollars 2017 - 150 years
Square-shapped base with flat round top.
2 dollars 2018 - Armistice
Pyramid-shapped knurling with flat round top.
2 dollars 2019 - D Day
2 dollars 2020 - Bill Reid
2 dollars 2020 - Victory
1 dollar 2020 - United Nations
10 dollar 2021 - Bluenose
2 dollars 2021 - Insulin
1 dollar 2021 - Klondike
1 dollar 2021 - Alexander Graham Bell
1 dollar 2022 - Oscar Peterson
Pièces produites avec et sans couleur.
2 dollars 2022 - Summit Series
2 dollars 2022 - Elizabeth II
Knurling overview - 2004 to 2018
Knurling overview - 2019 to 2022
In my opinion, Royal Canadian Mint is still trying to figured out the best knurling for the paint.
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- Canadian coins
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