Yes there was but i think we can place this one in the 50's: the short lines in the 3, 6 and 9 in the minutes subdial (in 40's dials these lines were longer as posted in the examples shown above); the closed 6 and 9 in the hour subdial (were open in the 40's) and, despite all variatons, the seconds subdial, in the 40's dials, had always the same configuration.
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