W. Watson & Sons, 313 High Holborn, London #3925
The Royal Van Heurck model with binocular and monocular tubes and continental base. c.1897
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An advertisement from 1892
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The Watson Van Heurck type instruments with the continental base are far less common than those with the English tripod base. On the right is an illustration of a later example of the Royal model with the English base.
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