Is the first Italian intaglio stamp, was printed by a private company, the Italian intaglio workshop, located in Rome.
Image size: 18¾ x 25 mm, only one star on collar visible
The 1909 printing is smaller than the other variants and differs in some details in the design.
Image size: 18,2 x 23,2 mm
Dark collar without shading stripes
Unificato lists it as perf Line 13x13½
The 1911 variant is distinguishable from the 1906 printing by the different perforations, the presence of two stars on the collar, and that the "第三" in Cent is closer to the left frame.
Image size: 19 x 24 mm. Stripes in the collar.