Keith Willshaw wrote:

snip

The caliber of the FK16 was changed in fact, the FK16 n/A was built from
1934 with new barrels to replace the 77mm FK 16's which were left over
from WW1 but in 1939 some 300 examples of the older gun were apparently
still in service being largely phased out by 1942. I'll agree that
few if any front line units would be so equipped and they seem mostly
to have been used for training.

Okay, thanks for clearing that up.

Guy