30" balance

This appears to be an S795-30 with a 1" 15-194 T-Lock Shoe. Is there a stamp code on the metal channel? Also, can we see the hole in the window track that the hook connects to? 

Thanks for getting back to me. You can use our 26-200 Screw Plug to insert into that square hole. You can then install our S795-30, with a stamp option of 30E. You'll need to buy our 15-194 shoe, sold separately, and swap it out with the shoe that comes installed by default to this balance (our 15-195). The video below shows how to do this. All of these parts can be ordered right through our online store. Let me know if you have further questions.