Group of 4 Pressed Glass Oil Lamp Bases

A group of four clear pressed glass oil lamp bases. The collection includes two larger lamps with ribbed, flaring bases and two smaller lamps, one featuring a diamond-quilted pattern on the stem and the other with a tiered, circular base. All pieces feature brass collars. The glass shows some internal clouding, surface wear, and minor residue consistent with age and use. No maker's marks are visible.