I would quess the top two boxes are dates. The third numeral throws me. If this is a date rather than a simple. design..
The 13-0 can be seen, but the third is either a zero in midst of added decoration or a five itself. I realize 1350 would be 1972 on our calendar.

I also read on Bokhara very educational site that a kozak can sometimes include a special date such as a dowry.
Thanks

As always thank you. As mentioned below why do I bring very nominal rugs to the board (by the way I have very nice old and newer rugs in my home.
Each of these rugs is a learning experience for me and hopefully I'm asking questions other might have. I post a rug that has something on it that brings a question. I already know all the answers to my nice rugs.

So thanks.