According to the Monogram Close-up #9; Bf109F (Thomas H Hitchcock, 1986 ISBN0-914144-20-0) the Bf109V25, W.Nr. 1930, D-IVKC, was altered to take the new F series wing as well as revision to the fuel lines. It also incorporated an annular oil cooler & spinner similar to that being used by the Me209. The fifth & last aircraft modification to take the new DB601E was the Bf109F-0, W.Nr5605 VK+AC (possibly V26). It was converted during the summer of 1940 & used primarily to test engine coolant, oil & fuel circulation systems, & together with Bf109F-1, W.Nr. 5643, D-IGUD, was to test the DB601Q in March 1941 using bi-fuel & a ducted cylindrical spinner.
From the ‘photo, the starboard wing appears to be squared off a-la Bf109E. If so that (theoretically) rules out V25. The V24 was fitted with the Me210 spinner & the V22 was fitted with an experimental supercharger air intake scoop intended for the F-series. So, Watson, that leads one to conclude that this must be the V23, W.Nr.1801, D-ISHN as it is still using an Emil type intake.