For some reason I had never heard of the fact that there is a sub-set of Gillette NEW razors that are classified as "De Luxe" razors. The main difference lies in the baseplate that is a bit bigger/thicker on the De Luxe models (this additional thickness now hides/covers the center groove making the bottom of the base plate smooth). "The De Luxe version is most easily recognized by the flat bottom on its base plate and .../.... sometimes a slightly larger hole. " The two versions of NEW De Luxe baseplates: The De Luxe versions look very similar to the, well what should we call them... "the common" NEW razors, but; a) They weigh a bit more (they are after all De Luxe) - about 3-5gr more, b) Manufactured only during the 1930's - and in two separate batches - during 1930 and later during 1935. Note: - The razors made in (circa) 1930 have Serial Number - but no patent numbers, and - The razors made in (circa) 1935 have Patent Numbers - but no Serial numbers. Also note - these De Luxe variations may appear in a number of models - NEW w/ common bar handle, NEW Tuckaway, NEW Lady set, NEW Big Boy, etc, etc So - maybe it's time to dig out those 1930's NEW razors you have and see if maybe you got yourself a De Luxe one and not a..well...common one.