Tall VICTORIAN Peacock Feather BLUE OPALINE Flower Vase-French?

This is another one of my put-aways that I have always assumed was of French Origin. The color was very popular with early Portieux or Vallerysthall glass but their wares were more opaque. This vase is classic Opaline, measures slightly over 12", has a 4" base, a 4 3/4" flared opening and is molded in a 4-piece mold whose lines stop under the rim and 1/2" above the base. The design resembles Peacock feathers or ribs with circles at both ends. The base is flat and looks like it was wiped in circular lines to make it smooth. Am I right in thinking that it's French? Any help is appreciated. RER (LOUMANAL)