I need to calibrate my formula for Dutch guns

I am finally dealing with the difference in the Dutch pound and the English pound and the Amsterdam foot and the English foot in my gun calculations. I need to find one of Nico Brinck's gun drawings that I have a both a weight in Dutch pounds (one pound is 494.09 grams) and the measurement in centimeters (I think that is what is used for dimensions). That will allow me to calibrate the formula. My original formula was based on English feet and inches and English pounds. The Amsterdam foot is aboutg 283mm and is divided into 11 inches.