Without seeing this, I would have said it very unlikely for a full-width door to be included on a 600 series. They were not all that common on 70 series models even until well into the 1980s. Very cool!
As Gordon said, a full width door was not seen on anything less than a 70 series. This must be a 1968 model as that was the only year this console design was used for the 600 series.