Hi Sturm78,
I agree with your ID for the 2 guns.
From what I understand,the Mle 17/34 was actually created after the Mle 1930. Thus, it is actually the Mle 17/34 which could have been called Mle 1934! But since the only change from the Mle 17 was the replacement of the Mle 1897 gun barrel by the Mle 1928 barrel without modifiyng the carriage, it was less modern than the Mle 1930 (with the Mle 1928 barrel), Mle 1932 and Mle 1933. Therefore, it would make sense to me to stick with Mle 17/34 to stress the oldest design of the carriage.
Emmanuel