Austrian Aircraft can be difficult to research.
The UFAG C-1 (also known as the Brandenburg C-1 series 61 – first series) was the first of a long line of C-1 aircraft -- this one powered by a 160 hp Daimler engine. The first of these were built based on drawings provided by Phoenix. The first series comprised 24 aircraft provided under a contract signed December 13, 1915. This was a very early bird.
For its time, it was considered to be quite good. It appears Brandenburg, Phoenix and UFAG all built some of these aircraft. Other than the wheels axles and radiators, the parts were NOT interchangeable. They all look a little different.
The series 64 (second series) were again powered by the 160 hp Daimler. A "universal fuselage" was designed by Phoenix and minor improvements were made to the wing structure. At least six of this series were converted to dual controls. These machines appeared at the front around May 1916 and were considered to be quite good for their time.
The series 68 (third series) were powered by the 160 hp Diamler engine. 152 of these aircraft were ordered on June 24, 1916. By this time the design was becoming obsolescent. Three of these machines were still in service in October 1917.
Series 63 (fourth series) consisted of 32 machines powered by the 160 hp Daimler. These were flown until mid October 1917 when they were relegated to training uses.
Series 67 (Brandenburg C.1(U)) was the first aircraft that was modified by the UFAG engineers. This model had a lighter fuselage and undercarriage, flush mounted wing struts and stronger wing cellulite. The were armed with a maching gun mounted under the lower wing outside of the propeller arc and a quick change bomb rack. These machines were underpowered by the standards of the day (still the 160 hp Daimler) and served mostly on the Russian Front.
Series 69 (sixth series) received the new 200 hp Hiero engine. Adapting the C.1 airframe to this new engine took some time and a number of modifications were made. The new engine produced an aircraft with a top speed of 104-110 mph (big improvement over the 88-96 mph of earlier models). It appears 98 of these aircraft were manufactured. This aircraft served to the war's end but suffered significant attrition. August 1 say only 23 at the front and by October only two were still flying.
Series 169 (Seventh Series)
Series 269 (eighth series)
Series 369 (ninth series) The last three series were powered by the 230 HP Hiero engine. Described in terms of speed and climb pilots claimed it could not be escorted by the Albatros D.3 s153 (a pretty good aircraft in its own right).
Now if that isn't bad enough,
UFAG also produced a C.1 Series 161 aircraft. These were produced in three series of 24, 220, and 40 aircraft. All were powered by the 230 hp Hiero engine. I'm not going to pick apart each of the various series other than to say they had differing performance in terms of speed and climb. These aircraft were a hot machine. Much better than comparable aircraft that the Germans were flying at the same point in time. Top speed at least 112 mph. Climb is outstanding.
The problem you will have is identifying exactly what aircraft your model represents. The Brandenburg C.1 manufactured by UFAG is often referred to as a UFAG C.1 -- especially the series 67 and later (These look more like a 161 than earlier series). The Series 161 UFAG looks a lot like an Aviatik Fuselage and (beginning with UFAG C.1 161.91) sports a split tail fin and an unbalanced rudder. Very weird lookin. Nothing like it that I have seen.
The earlier Brandenburg C.1's made by UFAG look like a Phoenix design. The UFAG models I have seen are most likely the Brandenburg C.1 (U).
I don't know where the Albatros C.1 stuff came from. John if you would care to disclose your source, I'd love to look at it.
mjc