You wouldn't do it to the Mona Lisa, so don't do it to your postal history collection!
After showing you this Parcel Card, I will be trying to restore it to its original condition. There are three more stamps on the back bringing the franking up to 17 r 25 kopeck, which corresponds to the faded tally bottom left.
It is very interesting and probably excited Dr Seichter - he stuck on more labels than usual.
First, it shows use of Trident overprints at a very early date (ZINKOV POD 29 8 18). Second, the destination in Minsk Guberniya is unusual (it arrived there KHOLMETCH MINSK 7 9 18). Third, it shows mixed usage of overprinted and unoverprinted stamps (permitted at this date). Fourth, the 5r and 10r stamps with Podillia 10bb are rare (Bulat 1770 and 1771, $200 and $225).
One can also speculate: high value stamps were in short supply, especially perforated and these got used up first. You are more likely to see a 5r or 10 r perforated used in August-September 1918 than six months later.
And now the Mona Lisa after conservative restoration work: