What can one say about a 200 gram calibration weight? Not much. The price was the lowest that I could find anywhere. I assume that it weighs exactly 200 grams. However, I must say that the online ordering process was quick, straight forward, and easy. I had the product in 3 days after ordering. It was a very pleasant buying experience, and I will definitely keep Old Will Knott Scales in my electronic roll-a-dex.

I am very pleased with this JSR-200. I am a coin collector. I like to catalog my coins and knowing the exact weight is very important to do this. Different denominations coins have a specific weight. Finding the coins that are the weight they should, I can filter out the fakes from the genuine. Very helpful! Thanks Old Will Knott

Glad I purchased the calibration weight with my scale (DuraScale D2 300). Although, I haven't needed it for calibration I do occasionally check the scale with it.

Excellent Weight. right on the money. I tried weights from other places and messed up a scale's calibration I already owned. Then I ran across an ad for Old Will Knott Scales and found their weights and scales and was Blown Away by their prices and quality. While other places are charging hundreds and thousands for comparable weights that meet basic standards of accuracy, Old Will makes simply accurate weights at an affordable price. Now to go on to their selection and quality of scales....outstanding...and the prices cannot be beat. This site is a metrology technicians dream...Thank you Old Will.

I ordered the 200 & 400 gram weights for my postal scale and other equipment that I want to keep accurate weight on. The weights arrived sufficiently packaged with no visible deficiencies. I am very pleased with the order and the timely arrival of the product.