Help identify my GDA dishes

Greetings,

I'm trying to identify my GDA dishes and hope someone here can assist me. I have a set of 12 8" dishes in superb condition that I'm hoping to identify the age and pattern name / number. I know, according to the back of the dishes, that they were manufactured somewhere between 1901 and 1941, however I was hoping to narrow down the manufacture date. I've seen similar patterns in a cobalt blue, however these dishes are more on the teal side. Any assistance any of you can offer would be graciously appreciated.

Cheers,

Keith