Bisected Mexico Sc#358

Hello all!
I recently received a mix of Mexico stamps and in it was this bisected cancelled 10c Transitorio stamp. Is this a postally valid use of this stamp? I read some resources from MEPSI that bisected 10c might have been recognized as 5c in value for a couple of days, but the blank date on the cancel makes me wonder whether it was made especially for a collector by an Hermosillo post office employee or if it is a fake.
Thank you all and have a good day,
Atom.