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[[File:Tabo-Trasparente-FlatClip-3V-RingedGray-Sr-Inscr.jpg|left|thumb|A [[Tabo Trasparente]] inscription]]

[[File:Tabo-Trasparente-FlatClip-3V-RingedGray-Sr-Inscr.jpg|left|thumb|A [[Tabo Trasparente]] inscription]]

In the '40 was maintained only the arrow clip version, with three thin cap rings and [[jewel]] and metal decoration. On all models was engraved on the pen body the ''Tabo'' brand in lower case letters of larger dimensions, above the words ''TRASPARENTE'' in thinner uppercase letters. Beside the mark, at left and right respectively, were reported the data about the patent on the filling system, with the inscriptions  ''BREVETTO'' and ''N. [[:File:Patent-IT-375925.pdf|375925]]'' in uppercase small letters.

In the '40 was maintained only the arrow clip version, with three thin cap rings and [[jewel]] and metal decoration. On all models was engraved on the pen body the ''Tabo'' brand in lower case letters of larger dimensions, above the words ''TRASPARENTE'' in thinner uppercase letters. Beside the mark, at left and right respectively, were reported the data about the patent on the filling system, with the inscriptions  ''brevetto'' ad ''n. {{Cite patent|IT|375925}}'' in uppercase small letters.

The later versions of this model were built using a single ring on the cap, always with the arrow clip and the [[jewel]] and metal rings decorations at barrel bottom and cap top. This version has been found with copies of the clip also shaped in the early versions of the pen, whose origins are unknown.

The later versions of this model were built using a single ring on the cap, always with the arrow clip and the [[jewel]] and metal rings decorations at barrel bottom and cap top. This version has been found with copies of the clip also shaped in the early versions of the pen, whose origins are unknown.