Eisemann RKLE 90 beacon blue lens 6V 60ies

Rare 6 Volt Eisemann RKLE 90 beacon lamp with blue lens in used condition. The power adapter in the base is missing (see last photo). Apart from that everything is good. The lamp is running very well. The lens is good and stamped with "B1007". The chrome ring is good and without dent. The lens and chrome ring are complete with the small often missing mount parts. The badge was painted and partially sanded and visible is “Eisemann RKLE 12 AB”. Made in Germany about 1966.