I have 2 Rutherford & CO lids. one was on a “gem” jar and the other was on a no dot crown. the crown doesn’t match yours which is all I can find in any info for Hamilton glass works, so I don’t believe it to be original. unsure if the gem belongs to the lid either as I can find such little info.
is there a good resource for Canadian jars? or is it just the red book?