Ned says on page 481 that 1963 range was 25677V2-29057V3 and in 1964 the range was 29058V3-32054V4 so some where from 63-64. I only drink good wine while reading and looking at Ned Schwing's Superposed book. Lucky you. MB
When I get home, I'll take a picture of the actual number as it appears under the lever and you see what you think. BTW thanks for the interest.
