Paul from SWISCO responded:
September 7, 2023
Hi there! Being that the visible glass height is 27-1/4", I would go with the 29" channel balance. However, you will need to weigh the window sash on a scale to determine the proper spring strength option. The top guide looks like the 19-035 and the bottom shoe might be the 15-004 but I'm not too sure from these photos. Would it be possible for me to see close-up photos of the top fitting from a few different angles? We would also like you to measure the bottom fitting as shown below and tell us what you get. Comparison of the S380 and S385 balance shoes.
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