Question About Burma Official Overprint

Came across this little variation while sorting out Burma Officials.

First I thought it is Scott O86, 5p issue of 1964 overprinted with 11.5 mm overprint. But I've noticed that one of the characters differs. First I thought that this is a part of the cancel that happened to be positioned perfectly right, but that would leave to much of a gap between the characters. So I think that the vertical line is the part of an overprint.





I can't read Burmis, so I don't know if this s is a different letter or just a line.

This is the only reference pic I found online for this issue.




Any ideas?

Here it is mint to match

SForgCa

That one is from the later issue. Likely from 1967 Scott # O97. The overprint is slightly different and longer, 15 mm.

My first idea is that the setting is not the same.The 2 small "o""o" are shifted too the right.Could be the letter slug on the left letter was defective or something. I Don't think
it's an extra letter (apparently that form does not exist in Burmese).
Does it measure 11 mm ?

Around 11.75 mm