Information on a Sears 22 cal.Model 126.19300?

If you are asking about the 22 cal Air Rifle it was made by Crosman (Model 140) Four different versions were made 1954, 1955-57, 1956-62, 1961-68. Check "Bluebook of Airguns" 6th or 7th edition under Crosman for more information on the model 140/1400. Crosman and Daisy made Airguns for Sears under the JC Higgin name.