Can Anyone Help With ID Of Early Guatemala Overprint / Surcharge On 1886 1c Blue?

Afternoon all,
Can anyone assist with the ID of the overprinted stamp shown? At first I assumed it to read 'OS' but can find no Guatemalan stamp as such. Then I thought it might read .05, but again no luck. Any suggestions appreciated.
Regards
DavidR



Edited for poor country spelling!

*** Moved by Staff to a more appropriate forum. ***

Check the 'Official' stamps section of your catalog? (is not in Scott, not sure about other specialized catalogs)
Don

Not in Gibbons. Could be a local initiative, or a fantasy.

I agree that it may be a local, hopefully a Guatemalan specialist will offer an opinion.
Don

Thanks for the replies so far. I had already checked out the 'officials' in my catalogue and on Stampworld, with no luck.
Regards
DavidR

Not listed in Michel either. Try the International Society of Guatemala Collectors (I.S.G.C.):
https://www.GuatemalaStamps.org

This is from the 1886 issue. Sc 31, ISGC 32. Don't know what the overprint might be.

My guess is that someone got a rubber stamp kit for their birthday .


On a more serious side the first thing I did was look at over a large number of Guatemala overprints over all periods of time {a few hundred stamps } and none were sloppy or of the poor quality of that overprint .It could be a private overprint for business reasons or part of a foreign cancel. The stamp above looks like it may have a purple cancel already ,so it can be a clerk made cancel for his office or staff.

Thanks everyone. Will leave it as unidentified for now.
Regards
DavidR