Block and Tackle balances to purchase

Purchasing Agent from Hamilton, OH
Hello,
Can you please help identifying the block and tackle balance stampings pictured?  I am having a hard time with the weight range.  Thanks for your help.
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Emily
Emily from SWISCO
SWISCO
Expert

Hello!

Thank you for contacting us. It appears your balances use a terminal clip like the Series 770 uses. Can you confirm if each balance shown here is used in a different window or not? 

The stamps don't match up with our options, however, so we will need you to weigh the window sashes and get back to us with the precise weight. 

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