Same engravings as on the 1f first series.
Two differences:
- the release button has a "bowl" shape,
- the standard of speeds is changed: 1/25th, 1/50th, 1/100th, 1/250th, 1/500th and B rather than 1/20th, 1/30th, 1/40th, 1/60th, 1/100th, 1/200th, 1/500th and Z.
Serial numbers: # 300000 to # 400000.