Royal Nippon teacup unmarked

[FranMac]

Hi, hoping someone recognizes this teacup. Circa 1800. It is unmarked. We think it's Royal Nippon but need name of pattern.

 

Amazon Forum Fav 👍

DR.ÖTEK Metal Detector, Waterproof Gold Detector, Pinpoint & Terrain Modes, Professional Metal Detector - Grab it through Amazon!