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233 engine oil filter

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My 34 Buick's 233 engine has an after market oil filter canister.   It is a Winslow Oil Conditioner  # 5-C.  It was produced by the Winslow Engineering Company of Oakland, California and patented in the early 1940"s.  Does anyone know what color it was painted?  I  have researched and found Winslow Oil Conditioners in light green, gray, and light blue, but they are all used in aircraft.

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Thanks for the picture Jim.  Is your canister made by the Winslow Engineering Co.  Imprinted on the lid of my canister are the words: WINSLOW ENGINEERING CO - - OAKLAND. CALIF.  USE No 5-C OIL CONDITIONING ELEMENT.

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