The Folding Reflex was introduced in May 1921 in the 3½ x 2½ inches or 6½ x 9cm. size. It was only ever made in this size. N & G stated: 'Since its introduction a number have been in use, and the practical experience gained during this time has been highly satisfactory, and confirms all our claims made in our announcements'. And what were those claims? N & G claimed the camera as being compact and light, 'delightful to use' and 'affording a full size reflection of image right up to the moment of exposure', with very little weight. The camera featured a new design of focal-plane shutter with a simple but reliable mechanism. This was the subject of British patent number 158194 granted to P. G. Mason, N & G's principal designer after Newman's departure, and N & G on 26 September 1919. The camera was also shown in patent number 158601 granted on 26 September 1919. Extolling it's virtues the company claimed: 'There is no other reflex Camera made throughout the world, of the high standards of workmanship, super excellent quality, and critically adjusted efficiency attained in this model'.

The following year N & G claimed they had made no improvement on the camera 'it being in our opinion, impossible to improve on'. A range of accessories was offered for the camera including lenshoods, filters and cases. The camera with the Ross f/4.5 lens was sold for £55. In 1924 the company reduced the price of all its products and the Reflex was offered at £48. In 1926 a Dallmeyer Pentac f/2.9 lens was offered for the camera. The camera continued to be advertised up to 1938.