Mismatched Head Light Glass in 1936 Fords

[mercman from oz]

When attending car show, have you ever noticed mismatching headlight glasses on 1936 Fords.
Have a look at this pair, and you can see there is a difference in the gap where the smiley face is.
On one glass, it is very close to the horizontal line above it while on the other, there is a larger gap.
I have seen numerous 1936 Fords with mismatching headlight glasses.
Have any other V8ers noticed this slight difference?