See also Mark Ouwerkerk's Dutch Colonial and Marine bagseals, "Due to all the similarities with Dutch customs seals, I assume that this is a seal that was used by the Ministry of the Navy. This is a customs seal with the longer coat of arms including a cross on the crown (used until ca 1845). On the reverse are crossed anchors in a circle. The circle itself is made with a thicker line.
In the early days of the kingdom there were many reforms going on in the field of the tax system, so the crossed anchors may have been used again for recognisability. This type of seal will be introduced around 1815, because that’s when the Dutch coat of arms was also introduced. Around 1845 a shorter national coat of arms was used."