Rare pair of early 20th-century revolving bookshelves - oak 72"

A fabulous and rare pair of revolving bookshelves from the 1920-30s. Possibly by Josef Hoffman, because the craftmanship and design details are of the highest quality. The shelving unit slides onto the base support.

Condition and wear consistent with age and use.
Each measures approx. overall 72" high x 26¾" x 26¾"
Each measures approx. overall 183cm high x 68cm x 68cm