Nico Brinck's Swedish 12pdr gun

One of the drawings that Nico Brinck sent me several years ago shows an iron Swedish 12pdr gun manufactured by Finspong. The gun had been purchased by the Admiraliteit van Friesland. The inside bore of the gun was 12cm or 4.7244 English inches. An Amsterdam inch is 283mm/ft divided into inches of 25.73mm. That is larger than the English inch of 25.4mm, so the bore in Amsterdam inches is 4.664in. The gun is 260cm long or 9ft-2in in Amsterdam feet. The length in English inches is 102.36 inches or 8ft-6.36 inches. The weight is 3208 lbs, compared to the 3480 lbs for the bronze 18pdr gun from 1632.