I am looking for some clues for identification of this piece of, assumingly, Ridgway & Co. origins. If anybody have an idea what the whole pattern might have looked like, I will be very glad to hear. Thanks.

Couldn't upload photos via your service, so here's a link to Google Drive:
https://drive.google.com/drive/folders/1jaG258MTr2x2_jRC8jjP3TxATzBckCQw?usp=sharing