Braun made two different "Series 1" shavers that use different parts. The two different series are:

Braun Type 5683, Type 5685
SERIES 1 130, 130s, 130s1, 140, 140s, 140s1, 150, 150s, 150s1, 150s-1

Braun Type 5729
Series 1 180, Series 1 190, 190s, 190s1, 190s-1, and 1775.

Click on the shaver that matches yours to go to the correct parts for your shaver.