Gwalior

Gwalior was one of the convention states located in central India. Since you were never taught about India or geography in general, you probably have no idea of what's being talked about. And no, it's not that state next to Illinois.

 File:Gwa QV 1a wide.jpg| File:Gwalior QV red ovpt.jpg|1885 1 rupee Victoria File:Gwa widow.jpg|1900 3p definitive File:Gwalior KEVII.A.webp 
 * In 1885-97, various Indian stamps with Queen Victoria were overprinted with a widely spaced Gwalior char.png and GWALIOR.
 * Three low values were initially overprinted with 13mm spacing between lines.
 * more values were soon overprinted with 17mm spacing generally (4a and 6a values with 15mm spacing).
 * In 1885, Indian stamps were overprinted with a closely spaced Gwalior char.png and GWALIOR in red.
 * In 1885-97, the same overprint was printed in black on a range of values.
 * In 1899-1911, the same type overprint was issued, the Hindi inscription now 15-15½mm wide.
 * In 1903-06, Edward VII issues were similarly overprinted, the lines 1¾mm apart.
 * In 1908-11, Edward VII definitives were overprinted, the lines now set 2¾mm apart.
 * In 1907-08, the new designs were overprinted.

 File:Gwa KGV.jpg|1913 3p George V File:Gwalior 5r KGV.jpg|1913 5r George V File:Gwalior KGVI half anna.jpg|1938 ½a value File:Gwalior KGVI 3a.jpg|1939 3a value File:Gwa KGVI 3a.jpg|1942 3a George VI 
 * In 1912-23, George V definitives were similarly overprinted. In 1923-27, stamps in new colors were similarly overprinted.
 * In 1921, a sans-serif GWALIOR 9d surcharge on the 1a value was issued.
 * Beginning in 1926, on multiple stars watermarked stamps, the typeface was changed to a taller lettering font.
 * In 1935-36, values in new colors and designs were also overprinted.

Official issues
 File:Gwalior halfa offic QV.jpg|1895 ½a value File:Gwa KEVII 2line off.jpg| 
 * In 1895-96, Queen Victoria Indian values were overprinted with two lines in Hindi, Gwalior char.png at top.
 * In 1901-04, values in changed colors were also overprinted.
 * In 1903-05, Edward VII issues were overprinted with lines spaced 10mm apart.
 * In 1907-08, overprints were spaced 8mm apart.
 * In 1907-08, the new designs were overprinted, with 8mm spacing (1907) or 10 mm spacing (1908).

 File:Gwa KGV offic.jpg File:Gwa KGV offic .jpg File:Gwa KGVI 2 line off.jpg File:Gwalior KGVI offic.jpg File:Gwa KGVI offic.jpg|1940 1A value 
 * In 1913-24, George V definitives with single star watermark were overprinted in two lines again.
 * In 1927-35, the definitives with multiple stars watermarks were also similarly overprinted.
 * In 1936-37, the new designs were also overprinted.
 * In 1938, two George VI values were similarly overprinted.
 * In 1940-42, George VI stamps were overprint a smaller single line overprint in a different font.
 * In 1941, an obsolete George V 1a3p value was surcharged "1A" with a bar striking out the old value.
 * In 1942-47, George VI rupee values were overprinted in two lines.