"Diamond-E" logo for unknown maker who rebranded brushes with store brands
Possibly made by Erskine?
This is a 1918 trademark by Sears in Canada, not sure how or even if it is related.
Disclaimer: This site is not affiliated or endorsed by Rubberset Company, a division of the Sherwin-Williams Company. Rubberset Company has a website with their summarized history here. This site is exclusively concerned with the early history of the company as it relates to their shaving brushes and was compiled from public information freely available on the web. It is intended to be informational in nature, not commercial.