My fascination with and confusion about proper dating of Roper stoves is well-documented on this site. Here’s a brochure that may help somewhat. Either way, it’s got great period details
Below is an interesting bit of info: a letter from the Roper Corporation to stove dealers announcing a new Roper for September of 1944. The letter notes that production of gas ranges in the plant ceased on July 31, 1942. This lets us know that there were 1941 Ropers, so maybe my Roper is correctly dated to 1941. It doesn’t answer the question of whether 1940-41 parts were used on 1944-and-on models.