This is a Seaworthy Boats logo that mentions Chester Rimmer as a Naval Architect. Chester was a MIT graduate in naval architecture. This type of label was used prior to the Jacrim logos. So this was used for the first few years of the company. If a boat has this label it was produced in the late 1920’s. The Seaworthy name was not an early company name but a name for the boats produced because they were build to be seaworthy.