very old chinese language
imo, the other answer is significantly "inventive" :)

, as @tang ho indicated, the correct reading should be "蠶種改濟之章".

and, these're kanji, japanese related (it's 繭印紙 蚕種印紙)

here's relevant pic &amp; link:



https://buyee.jp/item/yahoo/auction/j511816810?lang=en

i would suggest the op ask again in japanese stack exchange.

https://japanese.stackexchange.com

have fun :)