The Royal Ruby was introduced in 1902 in either double or triple extension form. Sizes were 3 ¼" x 4 ¼", 5" x 4", 6 ½" x 4 ¾" and 6 ½" x 8 ½". The Royal Ruby was the top of the range field camera from Thornton-Pickard, it was based on the Ruby with additional features such as rackwork to the rising front, rackwork to the rear standard and improved side swing (swing back). The rear standard could be brought close to the front standard for wide-angle work. A focal-plane version in the half-plate size was advertised for a short time from 1904. During this period a Ruby Rapid Rectilinear was the lens normally supplied with the camera.

In 1907 a new strut arrangement and front standard was introduced (BP 4515/1905) which allowed greater movement of the front standard. At this time 7 ½" x 5" and 10" x 8" sizes were added and the quarter-plate and 5" x 4" were ended.

Around 1909 an overseas model in teak with screwed joints was available. Brass binding was an option in either teak or mahogany. The improved version was offered with several lens options.

The lens on this example is fitted with wheel stops which is unusual for the period.