Mike and Fran- You could actually lock the two left doors flat without closing the right. The only thing that holds the right door down is the lap of the center door over it, so you need to close it first if you want it closed at all and locked.
The Brown secretary only had two escutcheons originally and they were on the center door. The other two were added later, and you might want to leave them off. The original escutcheons were bent into the hollow of the center door. I had Bob Ball cast all this stuff from my patterns, and he should still have them.
The wood on the original, lucky for me, was pretty plain south or central American stuff. I was able to get wood nearly identical from my dealer at he time. I even got quartered stock for the door that just happened to have a defect in exactly the same place as the original, which was a little twilight zone. The Goddard corner chairs we just made were another story- really heavy Cuban style stuff. As you know, a lot of their stuff was figured and dense, but I'm glad the secretary wasn't.
If I can figure out how to post photos I'll see if I can find the ones of the details on the original. John Davis may also have a set of photos from our class, or if you're out there, John, maybe you could take some pics of yours and post them. The doors are definitely a project to get right.
Another interesting thing a bout them is that the panels on the flanking doors were just glued to the frame with some molding acting as glue blocks on the inside, and no evidence of them ever having come loose. The center door on the original must have warped, because there was a sliding dovetailed batten across the inside at the top that I believe was put in by Goddard soon after the piece was made.
Best-Al