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Let me make this statement then.

Whaler used Perko Stern Lights in 1971..... I had one...

How's that?

Now, the above statement may or may not be true as I was not the original owner.
However, my 1971 Sport 13' was equipped with factory Navigation Lights.
I have added this info to the 13' Owners list and will add the information as it comes in.
Perko or Kanier Stern Light......
Look at the first entry which is my prior 13' Sport.
http://www.whalercentral.com/articles...cle_id=101

The connection is to follow the changes of different parts through the years. So maybe I am not getting my point across to you or you no longer have an interest in the different parts used.
What am I missing here? Does it matter to you when parts changed or are you missing my point?
Mine had a Perko and it may be possible that Whaler used some Perko Stern Lights in 1971 and maybe some other years.
We all know that Whaler ran short of some parts at some time during some years and they substituted other manufacturers parts.