Richard, If you look at the drawing file, the 1930 is #46307, 1931 is #51526 and replaced by 58427. both that are called for in 1931 don't resemble the 1930. However, they probably had so many left overs that many 31's and 32's had 1930 dipsticks. The two called for don't have a wood or bakelite handle but the #51526 looks like it should! I think the purpose of the aluminum extension was to create a cooler dip stick for those idiots that would grab it with their bare hands after the engine had been running. Bill