Oil Jar. Clear; silver. Glass; tin. This blown-molded jar or bottle has eight side panels that curve over the shoulder. It is wider at the sholder then at the base. It has an applied octaganol base with pontil. The base is embossed, Design Patent No 87167 and 73. The metal screw-on cap with spout is marked, "The Master Mfg. Co., Litchfield, Ill. Patd. Sept. 14, 1920.