soft window accessories authenticity

beeing the proud owner of a 911S softie , i have done lots of research about the cars , two question remains


the inner traga bar cover , there is 2 models , a flat one ( does not surround the handles) and a thick one ( does surround the handles) were they 911-912 dependant as i have only seen the flat only one 912

the other question has to do with the tonneau cover, were all the softie equiped with it , was it an option, woudl it be on the COA

i hae rarely seen cars without the tenax fastner, mine does not , and even when the paint was stripped , no signs of them, how would it know

because i make the soft window kits, i get the question all the time and would like to answer the right thing

thanks

yves