Received an email this morning from the gentleman who commented about this rifle.
"Is actually more of a transition model. The transition is from a full length magazine tube to 2/3 - rear sight dovetail moved from 5 or so inches to 3 inches (a few with no dovetail) - rifle sight to shrouded carbine sight - 17 1/2 or 17 3/4 barrel length to 18 or 18 1/4 inch barrel. - Model 14R stocks used for a period of a few months in PROBABLY late 1924."
The date code on this rifle is for June of '24, so this information may be correct.
The rifle came from the estate of gentleman who had a collection of interesting variations of otherwise 'common' rifles. Trying to figure out why this one was part of his collection.