It is a V-3, and the first "Moskito" to be fitted with radar. The A-0 actually came before the V-3, however the A-0 was not fitted with Radar. The only A-0 built was later converted to an A-4 so even if this was an A-0 then it still is labled wrong.
Chronology of the TA 154 "Moskito"
August 1942 RLM establishes the requirement under Milch's instructions.
March 1943 The TA 154 is compared at Rechling with the Ju 388 and the He 219 for Luftwaffe evaluation purposes.
1 July 1943 First flight of TA 154 V1 with Flugkapitän Sander in the controls, at Hannover Langenhagen airfield.
31 July 1943 V1 crashes due to undercarriage failure.
September 1943 in Erfurt begins the A0 series production.
25 November 1943 Speed test with A0/U1 aeroplane; it reaches 620 km/h fully armed.
25 November 1943 First flight of the first fully armed TA 154, the V3.
22 December 1943 EKD 154 is established as troop testing unit of the "Moskito".
18 February 1944 V4 crashes due to undercarriage failure.
28 February 1944 V8 crashes due to undercarriage failure.
7 April 1944 V5 crashes due to undercarriage failure.
18 April 1944 V9 and V12 crashes due to undercarriage failure.
28 June 1944 Cancellation of the entire production.
Autumn 1944 Some "Mistel" combinations with Fw 190 over a TA 154's are built in central Germany. They are intended to be used against American B-17 formations. None of them goes to action.
30 April 1945 An experimental re-adapted TA 154 with mid-wing antennae and angled wing tips crashes at Stade. Last crashing of TA 154.
There were however 8 production Ta-154A-1 which were later converted to other standards.