Theory......
Sony didnt go to 13" sets till the mid 80's.
This is a pre SG613 set which makes it early 70's.
The back was obsolete by abt '75 when they went to
an all plastic cab. SG-613 set.
Looks like another tag was screwed over the model ##.
Has KV13 designation because the back was desitined to
go to Canada or another place that used the 13" "size".
So our consumer equivalent is a KV12??
73 Zeno
