Even though the windows are new, I was unable to locate the serial numbers before I installed them. They were supposed to be on a paper decal located within the wall contact exposure.
As such, I contacted both Kinro and the online dealer, and I am currently waiting on both for a response.
I do know that the windows are part of Kinro's "2000 SV" series, if that helps (?)
I will post more information as soon as I receive it.