Help identifying antique credenza

Hi everyone.

This credenza is a family piece, acquired sometime in the 1960s, but no one seems to know anything about it other than remembering someone mentioning "Victorian" and "East Indian Rosewood."  I am interested in knowing everything about it's design, maker, woods used, period or any hints that can be provided, including how to care for it and what it might be worth.  I have looked for any markings or signatures and haven't seen any but I honestly do not know where to look. 

The dimensions are:  64"W x 42"H x 20"D.  It has two beautifully figured and perfectly bookmatched burl wood doors in front with a key lock on the right door.  The sides of the cabinet also have matching burl.  No drawers.  Single cabinet opening from front, with three finished shelves on inside (including bottom/base).  I don't know the type of interior wood but it is a bit more yellowish than the pictures indicate, trimmed with a darker wood.  The marble top is almost 2 inches thick (and heavy!) and is cut to fit to a conforming case on the top.  The inside right door (last photo) has a metal plate behind the lock.

This is a great website!  I've spent several hours admiring the beautiful craftsmanship and enjoying the posts.  I'm here to learn and would be most grateful for your comments. 

[Historical image from i64.photobucket.com — no longer available][br]
[Historical image from i64.photobucket.com — no longer available] [br]
[Historical image from i64.photobucket.com — no longer available][br]
[Historical image from i64.photobucket.com — no longer available][br]
[Historical image from i64.photobucket.com — no longer available][br]
[Historical image from i64.photobucket.com — no longer available][br]
[Historical image from i64.photobucket.com — no longer available][br]

I was just googling around and found this piece by Alexander Roux.

The frames around the door panels are *exactly* the same as mine.  Would that be a common feature of multiple makers?

http://www.bargainjohn.com/images/F200/F207CRoux7.jpg

http://www.bargainjohn.com/f207bSideboard.htm