Celery dish and four matching salt dishes. Hand Painted Nippon mark on pieces

Nippon vintage celery dish and matching salts. Difficult to find matching sets. There may have been 6 salts at one time. Bought in Sanford, FL which in the 1920’s was know as the celery capital of the USA. See markings, may be as late as 1930, but would need expert advice. It is a violet pattern but flowers are pale blues.