This is a head-of-page ornament from a 1776 book about exams in schools in Husum, a harbour city in modern northern Germany. It's quite a unique ornament - I've never seen this style before.
觀賞波浪和樹木
bw、deco、decoration、flood、ocean、ornament、plants、sea、tree、trees、wave、waves
BW、裝飾、裝飾、洪水、海洋、裝飾、植物、海、樹、樹木、波、波浪
資料來源：openclipart ( https://openclipart.org/ )