This multiple character 4 issue series was first published with #1 December 1, 1955 and ended with #4 in May 1956, It was published in Milan, Italy by the publishing house Editorieale Milanese. Each issue consisted of 16 black and white pages with a color cover.
The series initially appeared in a medium horizontal format. The first two issues present the reprint of the adventures of RAZZO (RZ) by Angelo Platania with the episode in two episodes "Under the polar cap" by Delio and Torchio, and bears the words of the Invincible Series on the cover. The third issue and the supplement LA GRANDE AVVENTURA host the comic adventures of GELSOMINO (GE) by G. Lani and RIC E RAC (RR) by Guido Zamperoni and brings the word ALBI 2000 on the cover. WEST (AW). The necklace then resumes with the single word Invincible Series in a strip-like format. The material presented by Editorial Milanese is the subject to numerous reprints, both for the first sale on newsstands and for the market of mailings. Under various series presented by the Fumetti Publishing House,
01 (01.12.55) - “Il raggio della morte” (RZ) (The Ray of Death)
02 (15.12.55) - “Mani in alto!” (RZ) (Hands Up!)
03 (05.01.56) - “Tamburi lontani” (GE e RR) (Distant Drums)
04 (00.05.56) - “Furore indiano” (AF) (Indian Furor)