The balance has the number 26 3 BSI stamped on it. The word kit I is on the locking mechanism

Hi there!

The balance shown here resembles our S380-27 or S385-27 but you'll need to measure as shown in the image below to see which one matches up. The Series 380 has a 1" deep shoe and the Series 385 has a 1-3/32" deep shoe. You will also need the 2630 spring strength option, based on your 26 3 stamp. As for the clips, could you be referring to take out clips like our 16-002? Look this over and see if it matches what you need.

We'd be happy to help ID your locking latch but we will need to see photos of it to compare to our inventory. 

Comparison of the S378, S380 and S385 balance shoes.

Thanks! Looks like you're showing a take out clip and lock. The clip is a match for our 16-002 and I believe that lock is a match for our 90-005, though you should review our dimensions to confirm.

Alternate image for 90-005