The font types on M1 & M2;are there any references on the name of the font type?It is quiet
unusual that "M" has two different fonts in the same setting;(never seen in other countries).The fonts were made in the USA?; or were they brought in from the Philippines?
The letter "G","R" & "M" in particular stand out.
The 'Forgery types' shown before mean that the forged overprinted sheets were overprinted with a similar font;but not exactly the same..Why is that?
A font type has to have a 'name';as all type setters know.
(In the Naval Station Document [above] of 1930; the fonts are not the same as in the overprint.)
The only font that looks about the same that I could find for the moment is this one from a San Francisco newspaper (early 20th century).The "R","U" & "G" are quiet distinctive.
Font sizes are measured in points (letters per inch).
In the same newspaper, different font types were used of slightly different styles;so it is not always obvious.___ I would think the fonts used for the overprint are from an old
type of design.
If you can; measure the overprint to obtain the correct point reference.(below).https://www.gloverstamp.com/font-details
Found this add in the "Guam
Recorder " of 1925. look like the same fonts second line.
Could it be the "Guam
Press" that overprinted the stamps ?