1890 balance stamp

Question

Hi,
I have a balancer which seems to be the the S-380. However, the numbers on it are 1890, and the S-380 only goes up to 1850. Do you carry an 1890 or is there a substitute?

Casey · Accepted Answer

Hello,

Your stamp code is from an outdated weight system that doesn't correspond to our strength options. We can still help but we'll need to know the exact weight of your window sash to determine the correct spring calibration. I'd also recommend confirming that the end fittings and 1" shoe depth below match your balance. Thank you!

Close up view of the S380 balance top.

Close up view of the S380 balance shoe.