this is a ceramic mold from either Kimple or Gare and was produced in the 1980-90 era. I sold many of them to be painted in my ceramic studio in Mesa, AZ. thank you for sharing.
I also do ceramics and the molds for these Native American designed bottles were made by Kimple Mold co and Gare also made a few with animals, bears ,deer and fish I have over 3000 molds and these bottles are in my shop as I'm typing this and they were produced in the 1980's and early 1990's Not in the 1890's They are collectables but not Antiques