So just got this indicator imported from Germany, and it doesn’t fit my 75 front.
The shape is correct but the bolt holes are at a different angle to the 75 so the screws won’t go in.
What's the part number on the blue box?
Yeah there were 2 designs - IIRC Cibie brand and Hella brand (possibly one had 2 screws and the other 3?) You might be able to find some of the 2-screw housings to suit your new orange lenses...
1234139 is a right hand Hella lens. It fits into a RH Hella housing, p/n 1259739.
If your existing lens or housing is a Cibie, it will likely have that brand name or "France" embossed on it somewhere.