In the German OOB the 8,8cm Pak 43/41 is missing, but I have to admit that even my german sources are in some points contradictory.
After the barrels of the Pak 43 were ready in Feb. 1943, but the carriage manufacture for the cruciform platform was lagging, it was first decided to mount the gun in the Nashorn/Hornisse tank destroyer. In April 1943 the Pak 43/41 was produced which was the barrel of the Pak put on the carriage of the 10,5cm leFH 18 (in other sources the 10,5cm leichte Kanone 41 by Rheinmetall which was never introduced), with the wheels from the 15cm sFH 18. 1403 were built until Aug. 1944. Weight 4350kg; height 1,98m; traverse 56°
In Dec 1943 / Jan 1944 the cruciform carriage was ready and 2098 of the Pak 43 were built. Weight 3650kg; height 1,7m; traverse 360°
sources: Wolfgang Fleischer, Die deutsche Panzerjägertruppe 1935-1945; and
http://www.lexikon-der-wehrmacht.de/...ehrkanonen.htm
Second version: Already in Mid 1943 the Pak 43 with 360° traverse on cruciform carriage was introduced but the production of the carriage was difficult and not up to the expected numbers so in the end of 1943 the Pak 43/41 as described above was built in addition.
sources: Alexander Lüdeke, deutsche Artillerie-Geschütze 1933-1945; F.M. von Senger und Etterlin, die deutschen Geschütze 1939-1945.
Ian Hogg (german artillery of ww2) is aware of the two versions but doesn`t give any further details.
In any case there was a 8,8cm Pak 43 (or 43/41) already in spring of 1943. In the game right now is only the later version (1/44).
If adding the Pak 43/41 it should have size 2 (28cm higher than Pak 43) and of course less fire control (and range finder), because of it`s split trail carriage.
And maybe someone knows exactly which Pak was introduced first.
Mario