We think these date from the late 50s, because the photographer stopped working for Life in 1961. The current building opened in 1951 but was described as relatively "unfurnished" at that time.
We thought you would be interested in a then-and-now comparison. The organ was much smaller; the altar was against the wall of the chancel; the pulpit was back further (on the broad step?) . What other differences do you see?