The OE belts are made by UNIROYAL and will last indefinitely unless exposed to oil (which is what that looks to be) and/or long term UV.
The normal position for installation on any of the belts is with the wording facing forward so the belt pitch is correctly set.
I use one to run test engines and have for many years.
__________________
When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
