Posted January 2, 2013 - 7:42pm
Watch records in database have several examples of 5AB up to 1947, including this 1947 Unknown record here. Pics from this record show an example w/ 47 on movement (pic below).
Posted January 2, 2013 - 7:45pm
Dr Ranfft shows a start date of 1936, but list no end date on the 5AB. His example movement picture is that of a 5AC w/ a 1949 (J9) production date- not the 5AB.