Overprint size is 16.5 mm x 3.0 mm. 
Made with printing type and ink.

Overprint Color: Black, Violet, Blue Violet, Red or Blue Green

This Tagle OFFICIAL overprint is the same in size and style with Scott O1-O4,
the 1926 Legislative Palace Officials
issued by the Bureau of Posts.
1917 DEFINITIVES
Perforation 11, Unwatermarked
Diagonal Overprint  18 to 30 Degrees Angle
Except on 12c, Horizontal Overprint

Red on 290

Violet on 290a

Violet on 291

Blue Green on 292

293

Red on 294

Red on 295

Violet on 298

Violet on 299
1923 - 1926 DEFINITIVE
Perforation 11, Unwatermarked

Violet on 303a