The rubber used in the rear cab glass of AD trucks is an industry standard Claytonrite rubber,usually in 1/4"x1/8" profile,it was used in everything from cars,boats and heavy plant machinery for many,many years.
I can't say if the 'chrome' insert was ever a factory standard but as others have mentioned it may have been replaced over the decades.
The 'chrome' and or plain black lock strip will easily interchange.
I used it for the rear glass in my 3 window to add a little
bling .
The chrome one does however have a tendency to discolour over time,it also goes brittle.
