Tom from SWISCO responded:
October 7, 2014
That stamp tells us how much weight the spring can support. However, I'm a little confused. I see you were looking at our S800-30, but the 2910 does not correspond to any option we have for this balance. Are you sure this is what you have? What is the width and thickness of your metal channel? The S800-30 is very skinny at 3/8" square. If yours is 1/2" square, you may have something else.
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