Do any Allen Edmonds aficionados out there know what type of leather these old Buckstrands are made from? I'm stunned I'm unable to find any information on these anywhere online. Even AE is having trouble tracking down the information. I think they were purchased around 2017-2018 and have red Vibram Gumlite soles. The style code is 4304. I'm trying to figure out the leather so I can properly clean and condition them without ruining the shoes by using the wrong product. Thanks so much!