Crosman made the model 130 in two variations the first one had walnut pump and handle 1953-1954. The second version had a metal pump 1955-1970. For a time Crosman did not put serial numbers on original parts. ( I had to do some reading to find this fact out.) Yours may be one of these models. I also own an old Benjamin that has no serial number.
Reference Blue book of airguns 7th edition.
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