Christofle Flatware Set with a strange marking, 90 under scales, which I would normally assume is 90% Silver, but this being French, I'm not sure. : r/Hallmarks
Silver Hallmarks Explained in Simple Terms | LoveToKnow
Hallmarks » Antique Silver Spoons
Antique sterling silverware and flatware, silver and silverplate sets
How to Choose the Best Flatware for 2020 | Reviews by Wirecutter