Please help identify correct window channel balance

A quick learner from St. Pete, FL says:
July 30, 2022
I have a 22-inch length (of the metal itself) window channel balance that looks close to Series 351, but for two problems (1) Although the length measures exactly 22 inches, the metal stamp says 2220, which matches only the 23 inch one and (2) the shoe is a different size -- substantially smaller. I've attached photos. Thanks! (You were really great in identifying the correct custom parts for my first order last month!)
Thumbnail of the uploaded file named IMG_0807.jpeg
Thumbnail of the uploaded file named IMG_0805.jpeg
Thumbnail of the uploaded file named IMG_0806.jpeg
Profile picture of Casey
Casey from SWISCO responded:
August 3, 2022

Hello,

Your shoe is substantially smaller because it appears to be broken. You'll need to measure an undamaged shoe to determine if you need the S351 or S390 channel balance.

As for length, if you're 100% sure that the metal channel is 22" long, then you will have to weigh your sash on a scale and refer to the chart shown under the balance product description to choose the corresponding strength option. Thank you! 
A quick learner from St. Pete, FL says:
August 4, 2022
By golly, you were right. On closer inspection, the shoe was broken, and here is a view of an intact shoe -- it's 1 1/8", so I'll need an S390. But the metal channel is exactly 22", so I guess I'll have to weigh the sash and use the chart to determine the exact one. Thanks.
Profile picture of Casey
Casey from SWISCO responded:
August 5, 2022

We didn't get any additional photos but you are correct that you'll need the S390-22 if the shoe is 1-1/8" deep and you will also need to weigh your sash to confirm the correct strength option. 
22" Series 351 Channel Balance
22" Series 351 Channel Balance
S351-22
$9.91
22" Series 390 Channel Balance
22" Series 390 Channel Balance
S390-22
$9.59
How to Replace a Non-Tilt Channel Balance
How to Replace a Non-Tilt Channel Balance
VIDEO
WATCH >
How to Repair a Jammed Window
How to Repair a Jammed Window
VIDEO
WATCH >
How to Identify Replacement Channel Balances
How to Identify Replacement Channel Balances
VIDEO
WATCH >
How to replace a non-tilt channel balance
How to replace a non-tilt channel balance
GUIDE
READ >
Choosing a Non-tilt Channel Balance: What Will We Need?
Choosing a Non-tilt Channel Balance: What Will We Need?
GUIDE
READ >
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 3-4 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.