Essentially Yes, though in actuality "originally" the I/C was slightly more open than the ¼ choke. It seems for the most part continental guns were made in 1/4 choke, US guns in I/C & English guns used both. The Us guns marked I/C will normally have the constriction of the ¼. English I/C guns have a little less.


Miller/TN
I Didn't Say Everything I Said, Yogi Berra