huge retro Italian art glass table lamp w/ hand-blown amber glass base, 60s vintage

Gorgeous hand-blown Italian art glass table lamp, not marked, probably late 1960s vintage. This has a optic patterned glass base in amber colored glass, not just a colored finish over clear glass.

It's 19 1/2" tall to the top of the light bulb socket, and 27 1/2" tall to the top of the finial. There's a little finish wear and spotting to the metal hardware, but overall this looks very good, and it works just fine!