In a recent lot, I found the illustrated page with what are obviously favour cancellations of some description. However, the cancels are distinct though I am still trying to discover the name of the city and a proper translation of the bracketed place name at the bottom of the cancel.

My first inclination was to leave the stamps on piece but the paper is very poor quality and is beginning to yellow badly so there is a consideration of damage to the stamps themselves. None have a high monetary value so that really isn't an issue.
Any suggestions or ideas? Any way to at least slow down the process of paper leaching acids? No staining or damage is evident at this point.
