Headlight & Wiper switch bezels - 2 different styles?

[SHANE 73Z]

Hey guys,

I have been searching for an answer to this but havent been able to find anything.

My LMC catalog shows 2 styles. One is the common chrome bezel with 2 square holes in the recess. I have seen & held these in my hand on several occasions.

The other appears to have 4 notches in the raised outer ring, without the square holes. I have yet to even find a picture of this style. What determined how a truck was equipped?

Thanks in advance,
Shane