Several Amsterdam ships from the 1640's have lower tiers armed with 12pdrs

Two ships, the Leeuwarden (built in 1645) and the Maan (or Halve Maan) (built in 1643) both have lower tiers armed with 12pdrs. The Leeuwarden, as I have recently mentioned, had 14-iron 12pdrs on the lower tier, along with 4-brass 18pdrs. The Maan had the same 4-brass 18pdrs, with 16-iron 12pdrs on the lower tier. The Maan was considerably larger ship, being 250 lasts and 128ft x 31.5ft x 12ft, while the Leeuwarden was about 200 lasts and 120ft x 29.75ft x 11.75ft.