10/31/2018. Remarks by Johan Visschedijk: "With the choice of the D.IIc kurz (short) as the basis for the initial production Sh III-powered SSW (Siemens-Schuckert Werke) fighter biplane to which the designation D.III was assigned, an order for twenty aircraft was placed in December 1917, this being augmented by an order for a further thirty in February 1918.

The first two series D.IIIs initially had a two-bladed propeller similar to that of the D.II, but this was replaced by a smaller-diameter four-bladed propeller which permitted a reduction in the height of the landing gear chassis. The Siemens-Halske Sh III eleven-cylinder rotary engine had a nominal rating of 160 hp, but its maximum output was 210 hp at sea level. The standard armament of twin 0.311 in (7.9 mm) LMG 08/15 synchronized machine guns was fitted.

The first D.IIIs came off the line in January 1918, and, between March and May, a total of 41 was sent to the Front where they demonstrated good handling qualities and outstanding climb capabilities. The Sh 11I engine proved troublesome, however, having been placed in service prematurely, and all D.IIIs were returned to SSW for modification. This involved introduction of the improved Sh IIIa engine and the cutting away of the lower portion of the engine cowling to improve cooling. In addition, some revision was made to the rudder contours. These modifications were also incorporated in a further thirty D.IIIs ordered in the interim, to bring total production to eighty aircraft.

A modified version, the D.IIla with ailerons on the upper wing only, participated in the second D-type contest (May 17 - June 28, 1918), but was not found to offer worthwhile advantages over the standard model."