Very rare round turn signal flasher used throughout the years in the General Market (non-US) Land Cruiser 40 Series. OEM part # 81980-20060. Discontinued by Toyota. Also suited for '74 and earlier U.S. models with the 81980-20040 part number.
This is the original part that plugs and plays with your vehicle, not the superseding 81980-12H04 part that requires modification to fit.