I have finally found pictures and figured out some of the more obscure Austro-Hungarian mountian guns of the Great War.
While the more know light guns such as the M75, M99 and the widely known M15 are pretty plentiful for pictures and information, so are the heavy mountain gun of 10cm.
The hard part is all the other lighter guns of approximately 7.5cm.
So here is what I found.
The M8 in 7.2cm was a bronze barrel piece in the same calibre as the older M99 but with a simple recoil system added. this picture is from Landships with incredible thanks to Massimo Forti!
The first picture down is the M8.
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The next piece is the 7.2cm M1907 GebK made for sale to China then seized and used by the Austro-Hungarian army to supplement their artillery park. Anyone in Prague to confirm if it is 7.2 or 7.5cm???
Also know as the 7.2cm GebK M9, found here in a museum on Prague. Note the similar breech block as the M8 but a recoil system as ordered by the clients.
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Lastly the precursor of the famous M15 was developed a bit at a time and sold abroad to China, Costa Rica, Ecuador and Uruguay. It was also known as the M1913, the M1914China and for the fifty two seized by Austria-Hungary as the M1912.
This is finally in 7.5cm and starts to appear similar to the later M15, note the lighter barrel.
Second picture down on the Landships page.
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Finally seeing them all in pictures is kind of like winning the lottery.
Thanks also to Axis history forum for the explanations of each pattern. Strange having to find the last details only because of their exports to China before the Great War?