Kitchener Fence by-law

[tomh009]

 but the butter is all 454g. I suspect the butter was just because they didn't want to buy new moulds back in the day? 

454g is one pound. A lot of cooks would object if that standard would change, I expect, though 450 is round enough.

Most of my recipes call for 250g or 500g of butter, not 454g. But if you mostly cook using (United States of) American cookbooks, that might not be the case.