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Old 01-13-2014, 11:51 AM   #2
MALAK
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Join Date: Jun 2010
Location: Highland, CA
Posts: 184
Default Re: Weird engine number: RF4504

It was probably a replacement engine and may have come out of some industrial or farm equipment. It may be a ♦ (diamond) block. Ford sold Model A engines for industrial use (without Ford SN's) where the manufacturer of the equipment may or may not have stamped their own SN. Attached is a pic of a Diamond Block I have with a clearly unmolested SN, like yours.
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File Type: jpg 2011-06-29_19-21-02_260.jpg (35.8 KB, 47 views)
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