The magazine pouch seems to be a German WW1 era type. You may want to look very closely at it for any markings like a date or maker stamp. I believe they would typically be under the flap where the brass stud is. The magazine with the 'N4123' is for a German NS era Luger that was assigned to a Navy unit. The other magazine is also for a German NS era luger, although I don't have my references in front of me to tell you what years of luger it was made for.