Zulu differences model to model??

[benyflyguy]

Was looking for some back seat Zulu ANR sets for passengers. Need 2. Don’t want to blow 1200 on two refurbished ones that are newer. Was looking at ebay and there are some original and Twos that can be had for cheaper but I never tried the original. The twos I like. The three I have now and like.

 

[midlifeflyer]

I have one of the later model originals (apparently there was a it of crossover with later originals have a teeny bit of 2 in them). Bought it used on eBay about 2-3 years ago and love it.