Identify Balancer
Thanks,
Jim
Hi there, Jim.
Your balance looks like a match for the Series 395 based on what I see here. Take a look and see what you think. Note, you'll want to measure only the metal channel when determining the length.
Since there aren't any stamps for this balance, you will have to weigh the window sash on a scale to determine the proper strength option for your replacement balances. There's a chart under the product description on the Series 395 store page that will tell you what option is best depending on the weight of the sash.
The decision is ultimately up to you! Either option should be fine for you as long as you replace both balances at the same time.