The wartime silloutte was much more functional as women began to step into new roles. Sister missionaries from this era worked in many capacities beyond proselytizing, including humanitarian and medical missions. The change in their dress would have helped them to accomplish that work.
We love the detail on this blouse and necklace. In fact, we'd wear the whole outfit today if we could.
Check out this replica of an 1830 edition of the Book of Mormon available at deseretbook.com.