Searching for Single hung balance spring 2830 V

Thanks for posting. It looks like you have either the S380-29 or S385-29. The only difference between these two channel balances is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement. Compare both with your old hardware to see what matches best. See the illustration below as a reference. For a new stamp option choose 2830.

Comparison of the S378, S380 and S385 balance shoes.

Great! I'm glad it's a match. All orders can be placed directly on our site at your convenience.