How can I identify an old piece of office furniture?

Question by admiral: How can I identify an old piece of office furniture?
I think this piece came from an architects office, it’s a tower of 10 drawers, made of oak, possibly from the 1920’s — 30’s.
It has cast iron drawer handles, with space in the handles for drawer content cards.

Best answer:

Answer by Michael N
One way to tell is to look for dove-tail joints in the outside corners of the drawers. This is a technique used in older carpentry to join two pieces of wood together, fitting them together sort of like a jigsaw puzzle, instead of how they tend to do it today with dowels and glue.

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