I picked up this pair of Florsheim combat boots at Stephen’s Vintage Clothing this weekend. These were locally produced as a subcontract through Endicott Johnson. The date code reads 5/27/47.
Update: My Dad (a former EJ worker himself) suggested that the date may actually be 1967, which would make them Vietnam era. It’s hard to tell for sure really. I’ll see if that may help track down their origins. There doesn’t seem to be much info on Florsheim combat boots. More info and pictures to come.