Identifying a Desk?

Your table has a depressed center section. So I think this is a typewriter desk. This height of the section for typewriter is usually a few inches lower than the 29 inch (73.7 cm) height of the traditional desk.

The first commercial typewriters were introduced in 1874, but did not become common in offices until after the mid-1880s. Since the first typewriters were very costly machines, therefore early typewriter desks often had some method for hiding the typewriter or getting it out of the way within the desk.
After World War I typewriters gradually became less costly; the typewriter desk was more or less standardized into a few forms:
the regular desk with a depressed center section;
an "L" shaped desk with a permanent or hinged (after removing the typewriter) lower level for the typewriter at the side;
versions incorporating lowering or hiding mechanisms.
Your desk is the regular typewriter desk with a depressed center section. I think it is from 1920-1930.

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