Shell Oil Research 1949 Ad Paper Hawkshaw
Shell Oil Research 1949 Ad. This color February 14, 1949 ad states Paper Hawkshaw Finds Hidden Clues. Shells Lubrication Indicator uses filter paper to check how much oil is getting to cylinder. Picture shows Paper Hawkshaw with Magnifying glass looking at cloud of steam. Magazine tear sheet picture is taken through plastic and may show wrinkles or crookedness that is not in the ad. This original magazine tear sheet measures 9 3/4 inches wide by 14 inches tall.
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