If my calculations are correct then no 3584 would make it no 721 off the production line.

so would fit in the time frame.

Production of the Bf 109E-1 was delayed by problems with the DB601 engine. The pre-production E-0s were ready by December 1938, by which point complete 109E-1 airframes were being made. However the engine did not appear until the spring of 1939. This partly explains the sudden rapid appearance of the 109E in Luftwaffe service over the summer of 1939 – all that was left to do was fit the engine to the aircraft. 850 Bf 109E-1s were delivered in the first eight months of 1939, in time for the outbreak of war.

http://www.historyofwar.org/articles/weapons_bf_109E.html