Turn signal indicator question

[roger-wilco-66]

Hi,

there are two styles of turn signal indicators for deuces (and others of course) around: the smaller old ones, and the newer ones with the large orange flasher. I see that the old style was used in the fifties (maybe even earlier) und up to the early sixties, and the new style later on. Does anyone know when the break was?
Were there any M35a2s (1966 +) with the old stlye indicators?

TIA,
Mark

 

[cranetruck]

This may be a start, a couple of dates.

 

[roger-wilco-66]

Thanks, Bjorn.
The latest M35a2 I've seen so far with the old style signals was a 67 model.
I just thought that there may have been a hard break. Background is that I might want to retrofit my truck with these old units, but I would not do so if it wouldn't be historically appropriate on a post-66 truck.