OK, I can confirm information from Simon part No engraved on the lower glass corner ended on 2 is the RH side, ended on 1 is the LH side.
The correct No for H4 headlamps are:
- LH side 1 305 620 181 - 60 R20
- RH side 1 305 620 182 - 61 R20
another clues :
-the setting mechanism on lower face is close to the letter R or L matching the correct side(you may need to scratch the oxide to find it)
- the yellow Ford label shows a large R or L (when you can read it)
LH side:
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